This patch make Xfce use "gnome" as the default icon theme and enable font antialias.

Taken from ArchLinux.

diff -upr xfce4-settings-4.12.0.orig/xfsettingsd/xsettings.xml xfce4-settings-4.12.0/xfsettingsd/xsettings.xml
--- xfce4-settings-4.12.0.orig/xfsettingsd/xsettings.xml	2015-02-24 03:33:11.000000000 +0200
+++ xfce4-settings-4.12.0/xfsettingsd/xsettings.xml	2015-03-01 09:52:24.376869688 +0200
@@ -6,8 +6,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <channel name="xsettings" version="1.0">
   <property name="Net" type="empty">
     <property name="ThemeName" type="empty"/>
-    <property name="IconThemeName" type="empty"/>
+    <property name="IconThemeName" type="string" value="gnome"/>
     <property name="DoubleClickTime" type="int" value="400"/>
     <property name="DoubleClickDistance" type="int" value="5"/>
     <property name="DndDragThreshold" type="int" value="8"/>
@@ -19,9 +19,9 @@
   </property>
   <property name="Xft" type="empty">
     <property name="DPI" type="empty"/>
-    <property name="Antialias" type="int" value="-1"/>
+    <property name="Antialias" type="int" value="1"/>
     <property name="Hinting" type="int" value="-1"/>
-    <property name="HintStyle" type="string" value="hintnone"/>
+    <property name="HintStyle" type="string" value="hintfull"/>
     <property name="RGBA" type="string" value="none"/>
     <!-- <property name="Lcdfilter" type="string" value="none"/> -->
   </property>
c81bd82b714bdab7'>commit</a><a href='/guix/diff/gnu/services/version-control.scm?id=4dccf25587ec0a131e6f17e7c81bd82b714bdab7'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/services/version-control.scm'>
<input type='hidden' name='id' value='4dccf25587ec0a131e6f17e7c81bd82b714bdab7'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=4dccf25587ec0a131e6f17e7c81bd82b714bdab7'>root</a>/<a href='/guix/log/gnu?id=4dccf25587ec0a131e6f17e7c81bd82b714bdab7'>gnu</a>/<a href='/guix/log/gnu/services?id=4dccf25587ec0a131e6f17e7c81bd82b714bdab7'>services</a>/<a href='/guix/log/gnu/services/version-control.scm?id=4dccf25587ec0a131e6f17e7c81bd82b714bdab7'>version-control.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/version-control.scm?id=4dccf25587ec0a131e6f17e7c81bd82b714bdab7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-01-10 11:49:13 +0100'>2023-01-10</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=22e9b01bdaa8184aa08f03542798750bc587b457'>services: git-daemon: Deprecate 'git-daemon-service' procedure.</a><span class='msg-avail'>...</span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2022-11-17 12:00:32 +0000'>2022-11-17</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=35ef5fca0ac997680e47942e25f403fb3ec54c7d'>services: gitolite: Use the correct variable for the user-group.</a><span class='msg-avail'>...</span></td><td>EuAndreh</td></tr>
<tr><td><span title='2022-11-07 20:29:14 +0100'>2022-11-07</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=73b35195681f8367e27ebf2a239c2d4790fb2304'>services: gitolite: Add local-code configuration option.</a><span class='msg-avail'>...</span></td><td>Alexey Abramov</td></tr>
<tr><td><span title='2022-10-17 07:29:09 +0200'>2022-10-17</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=82b0f3755d12e04578a54ee53b3a8051958e8143'>guix: Fix typos.</a><span class='msg-avail'>...</span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-08-30 12:37:19 -0400'>2022-08-30</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=9b5b1dde32b9526cd39b51978209ba3e61b6c785'>services: gitolite: Relax permissions on service user home directory.</a><span class='msg-avail'>...</span></td><td>David Thompson</td></tr>
<tr><td><span title='2021-11-30 01:08:55 +0100'>2021-11-30</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=892f1b7273d57b25940700877a02618fe826cc08'>services: Accept &lt;inferior-package&gt;s in lieu of &lt;package&gt;s.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-09-02 22:56:55 +0200'>2021-09-02</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=c60daa8e9dfa5f641ecb5f4f3a9135e27b58d2d7'>gnu: version-control: Add gitile service.</a><span class='msg-avail'>...</span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2021-09-02 22:56:44 +0200'>2021-09-02</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=cc16103861b26836908a7d16e0751739a0e20da2'>gnu: gitolite: Add unsafe-pattern configuration option.</a><span class='msg-avail'>...</span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2021-04-10 14:11:26 +0200'>2021-04-10</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=d2f2c09d273a25e99437305537f254a048281464'>services: git-daemon: Fix typo in docstring.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-10-05 19:41:23 +0200'>2020-10-05</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=4e3ed9bad9ed5758cdee6e636805f65e9ab710eb'>services: gitolite: Install the rc file as gitolite's user.</a><span class='msg-avail'>...</span></td><td>Julien Lepiller</td></tr>