Account Settings: Remove Audio and Video tabs

Remove Audio and Video tabs and move their functionality to the
advanced tab. These features should almost never be touched and they
don't "deserve" their own tab, as if they were important.

I think that this is a much better compromise than to remove the feature
altogether, because this could always be useful to power users.

Set the bootstrap servers treeview to have a matching 10px margin

Tuleap: #1408
Change-Id: Ia247f474b050c9d8494b8289055cc8b9a619cd20
diff --git a/ui/accountaudiotab.ui b/ui/accountaudiotab.ui
index 2099946..bea7694 100644
--- a/ui/accountaudiotab.ui
+++ b/ui/accountaudiotab.ui
@@ -10,8 +10,6 @@
         <property name="visible">True</property>
         <property name="can_focus">False</property>
         <property name="orientation">vertical</property>
-        <property name="spacing">10</property>
-        <property name="border_width">10</property>
         <child>
           <object class="GtkFrame" id="frame_codecs">
             <property name="visible">True</property>
@@ -74,7 +72,7 @@
               <object class="GtkLabel" id="label_codecs">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
-                <property name="label" translatable="yes">Codecs</property>
+                <property name="label" translatable="yes">Audio Codecs</property>
                 <attributes>
                   <attribute name="weight" value="bold"/>
                 </attributes>