ContextMenu Support!

LLContextMenu functionality pulled out of LLPieMenu, PieMenu is now derived from LLContextMenu
- The more attribute boolean of pie_menu element determines whether or not to have an actual submenu if it's not a pie, defaults to false which means actual submenu..
-- in the future we may want to have more more="true" depending on feedback
- Pie menu labels now dynamically get " >" appended to them (avoids stupid looking context menus)
- Positioning logic combined in part, mostly conditional still, in the future we could probably combine it more.
- handleHoverOver function combines common functionality between context and pies given an item and hover mouse coords.

LiruUseContextMenus debug setting determines which to use, default is pie, of course
- Context(/Pie) Menus are rebuilt when the setting changes value
-- this is safe at any point because all startup states have been accounted for
- "Use context menus instead of pie menus" added to System->General preferences (it's close to the bottom)

indra/newview/skins/default/xui/de/menu_pie_self.xml

@@ -2,15 +2,15 @@
 <pie_menu name="Self Pie">
 	<menu_item_call label="Profil..." name="Profile..."/>
 	<menu_item_call label="Gruppen..." name="Groups..."/>
-	<pie_menu label="Ausziehen &gt;" name="Take Off &gt;">
-		<pie_menu label="Kleidung &gt;" name="Clothes &gt;">
+	<pie_menu label="Ausziehen" name="Take Off">
+		<pie_menu label="Kleidung" name="Clothes">
 			<menu_item_call label="Hemd" name="Shirt"/>
 			<menu_item_call label="Hose" name="Pants"/>
 			<menu_item_call label="Schuhe" name="Shoes"/>
 			<menu_item_call label="Socken" name="Socks"/>
 			<menu_item_call label="Jacke" name="Jacket"/>
 			<menu_item_call label="Handschuhe" name="Gloves"/>
-			<pie_menu label="Mehr &gt;" name="More &gt;">
+			<pie_menu label="Mehr" name="More">
 				<menu_item_call label="Unterhemd" name="Self Undershirt"/>
 				
 				<menu_item_call label="Alle Kleider" name="All Clothes"/>
@@ -21,13 +21,13 @@
 			</pie_menu>
 			<menu_item_call label="Rock" name="Skirt"/>
 		</pie_menu>
-		<pie_menu label="HUD &gt;" name="Object Detach HUD"/>
+		<pie_menu label="HUD" name="Object Detach HUD"/>
 		
-		<pie_menu label="Abnehmen &gt;" name="Object Detach"/>
+		<pie_menu label="Abnehmen" name="Object Detach"/>
 		
 		<menu_item_call label="Alles abnehmen" name="Detach All"/>
 	</pie_menu>
-  <pie_menu label="Werkzeuge &gt;" name="Tools &gt;">
+  <pie_menu label="Werkzeuge" name="Tools">
       <menu_item_call label="Neu laden" name="Reload Textures"/>
 	  <menu_item_call label="Animationen" name="Anims..."/>
 	  <menu_item_call label="S. Count" name="ScriptCount"/>