Remove search customization features for simplicity

src/__version__

-0.1.21~beta4
\ No newline at end of file
+0.1.21~beta5
\ No newline at end of file

ui/#MainWindow.ui#

-<?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.38.2 -->
-<interface>
-  <requires lib="gtk+" version="3.20"/>
-  <object class="GtkWindow" id="window1">
-    <property name="can-focus">False</property>
-    <property name="border-width">10</property>
-    <property name="default-width">670</property>
-    <property name="default-height">520</property>
-    <property name="icon-name">system-monitoring-center</property>
-    <child>
-      <placeholder/>
-    </child>
-    <child type="titlebar">
-      <object class="GtkHeaderBar" id="headerbar1">
-        <property name="visible">True</property>
-        <property name="can-focus">False</property>
-        <property name="title" translatable="yes">System Monitoring Center</property>
-        <property name="spacing">5</property>
-        <property name="show-close-button">True</property>
-        <child>
-          <object class="GtkMenuButton" id="menubutton1">
-            <property name="visible">True</property>
-            <property name="can-focus">True</property>
-            <property name="receives-default">True</property>
-            <property name="tooltip-text" translatable="yes">Main Menu</property>
-            <child>
-              <object class="GtkImage">
-                <property name="visible">True</property>
-                <property name="can-focus">False</property>
-                <property name="icon-name">system-monitoring-center</property>
-                <property name="icon_size">3</property>
-              </object>
-            </child>
-          </object>
-        </child>
-        <child>
-          <placeholder/>
-        </child>
-      </object>
-    </child>
-  </object>
-</interface>