Removed About window modality

libublsettingsui-gtk3-about.glade

@@ -1,11 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.38.2 -->
+<!-- Generated with glade 3.40.0 -->
 <interface domain="libublsettingsui-gtk3">
   <requires lib="gtk+" version="3.24"/>
   <object class="GtkAboutDialog" id="AboutWindow">
     <property name="can-focus">False</property>
     <property name="resizable">False</property>
-    <property name="modal">True</property>
     <property name="window-position">center</property>
     <property name="icon-name">com.ublinux.libublsettingsui-gtk3</property>
     <property name="type-hint">dialog</property>