you need to add
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="10" />
with the size you want to each of the pawslistboxes under the line that has the id= part you might also have to edit column height
the quest desciption seems to show up in the
<widget name="Description" factory="pawsMessageTextBox" style="label">
you can just increase the font size in that section
you can try this and see if it works this has _not_ been tested
<widget_description>
<widget name="QuestNotebook" factory="pawsQuestListWindow" style="topwindow" visible="no">
<frame x="100" y="100" width="550" height="400" />
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="10" />
<title text="Quest & Events Notebook"/>
<bgimage resource="Quests Background" alpha="128" />
<widget name="" factory="pawsTextBox" style="header">
<frame x="40" y="12" width="135" />
<text string="List:" />
</widget>
<widget name="QuestTabs" factory="pawsTabWindow">
<frame x="5" y="3" width="250" height="250" border="no" />
<widget name="UncompletedButton" factory="pawsButton" style="button" id="1000">
<frame x="17" y="190" />
<label text="Uncompleted" />
</widget>
<widget name="CompletedButton" factory="pawsButton" style="button" id="1001" >
<frame x="106" y="190" />
<label text="Completed" />
</widget>
<widget name="EventLists" factory="pawsButton" style="button" id="1300">
<frame x="106" y="3" />
<label text="Events" />
</widget>
<widget name="UncompletedQuestList" factory="pawsListBox" style="textinput" xmlbinding="quests" id="1100">
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="12" />
<frame x="16" y="27" width="186" height="161" />
<highlight resource="Hightlight" alpha="128" />
<columns height="30" headings="no" xmlbinding="q" >
<column width="130" xmlbinding="desc" >
<widget name="Name" factory="pawsTextBox" style="label">
</widget>
</column>
<column width="0" xmlbinding="id">
<widget name="ID" factory="pawsTextBox" visible="no"></widget>
</column>
<column width="0" xmlbinding="status">
<widget name="Status" factory="pawsTextBox" visible="no"></widget>
</column>
</columns>
</widget>
<widget name="CompletedQuestList" factory="pawsListBox" style="textinput" xmlbinding="quests" id="1101">
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="12" />
<frame x="16" y="27" width="186" height="161" />
<highlight resource="Hightlight" alpha="128" />
<columns height="30" headings="no" xmlbinding="q" >
<column width="170" xmlbinding="desc" >
<widget name="Name" factory="pawsTextBox" style="label">
</widget>
</column>
<column width="0" xmlbinding="id">
<widget name="ID" factory="pawsTextBox" visible="no"></widget>
</column>
<column width="0" xmlbinding="status">
<widget name="Status" factory="pawsTextBox" visible="no"></widget>
</column>
</columns>
</widget>
</widget>
<widget name="EventTabs" factory="pawsTabWindow">
<frame x="5" y="3" width="250" height="250" border="no" />
<widget name="UncompletedButton" factory="pawsButton" style="button" id="1000">
<frame x="17" y="190" />
<label text="Uncompleted" />
</widget>
<widget name="CompletedButton" factory="pawsButton" style="button" id="1001" >
<frame x="106" y="190" />
<label text="Completed" />
</widget>
<widget name="QuestLists" factory="pawsButton" style="button" id="1300">
<frame x="106" y="3" />
<label text="Quests" />
</widget>
<widget name="UncompletedEventList" factory="pawsListBox" style="textinput" xmlbinding="gmevents" id="1100">
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="12" />
<frame x="16" y="27" width="186" height="161" />
<highlight resource="Hightlight" alpha="128" />
<columns height="30" headings="no" xmlbinding="event" >
<column width="130" xmlbinding="name" >
<widget name="Name" factory="pawsTextBox" style="label"></widget>
</column>
<column width="7" xmlbinding="role" >
<widget name="Role" factory="pawsTextBox" visible="yes"></widget>
</column>
<column width="0" xmlbinding="id">
<widget name="ID" factory="pawsTextBox" visible="no"></widget>
</column>
<column width="0" xmlbinding="status">
<widget name="Status" factory="pawsTextBox" visible="no"></widget>
</column>
</columns>
</widget>
<widget name="CompletedEventList" factory="pawsListBox" style="textinput" xmlbinding="gmevents" id="1101">
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="12" />
<frame x="16" y="27" width="186" height="161" />
<highlight resource="Hightlight" alpha="128" />
<columns height="30" headings="no" xmlbinding="event" >
<column width="130" xmlbinding="name" >
<widget name="Name" factory="pawsTextBox" style="label"></widget>
</column>
<column width="7" xmlbinding="role" >
<widget name="Role" factory="pawsTextBox" visible="yes"></widget>
</column>
<column width="0" xmlbinding="id">
<widget name="ID" factory="pawsTextBox" visible="no"></widget>
</column>
<column width="0" xmlbinding="status">
<widget name="Status" factory="pawsTextBox" visible="no"></widget>
</column>
</columns>
</widget>
</widget>
<widget name="Discard" factory="pawsButton" id="1201" style="button" >
<frame x="300" y="195" width="80"/>
<label text="Discard"/>
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="10" />
</widget>
<widget name="" factory="pawsTextBox" style="header">
<frame x="267" y="14" width="135" />
<text string="Description:" />
</widget>
<widget name="Description" factory="pawsMessageTextBox" style="label">
<frame x="256" y="37" width="280" height="161"/>
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="12" />
</widget>
<widget name="" factory="pawsTextBox" style="header">
<frame x="50" y="235" width="100" />
<text string="Your notes:" />
</widget>
<widget name="Notes" factory="pawsMultilineEditTextBox" style="textinput">
<frame x="30" y="255" width="490" height="100" />
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="10" />
</widget>
<widget name="SaveButton" factory="pawsButton" style="button" id="1203">
<frame x="22" y="370"/>
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="10" />
<label text="Save" />
</widget>
<widget name="CancelButton" factory="pawsButton" style="button" id="1204">
<frame x="111" y="370"/>
<font name="/planeshift/data/ttf/LiberationSans-Regular.ttf" r="255" g="255" b="255" size="10" />
<label text="Reload" />
</widget>
</widget>
</widget_description>
This also applies to any font size change or color