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/ascentprefssys.cpp

@@ -222,6 +222,7 @@ void LLPrefsAscentSys::refreshValues()
         mEnableClassicClouds		= gSavedSettings.getBOOL("SkyUseClassicClouds");
     mSpeedRez					= gSavedSettings.getBOOL("SpeedRez");
         mSpeedRezInterval			= gSavedSettings.getU32("SpeedRezInterval");
+	mUseContextMenus			= gSavedSettings.getBOOL("LiruUseContextMenus");
 	mUseWebProfiles				= gSavedSettings.getBOOL("UseWebProfiles");
 	mUseWebSearch				= gSavedSettings.getBOOL("UseWebSearch");
 
@@ -377,6 +378,7 @@ void LLPrefsAscentSys::cancel()
         gSavedSettings.setBOOL("SkyUseClassicClouds", mEnableClassicClouds);
     gSavedSettings.setBOOL("SpeedRez", mSpeedRez);
         gSavedSettings.setU32("SpeedRezInterval", mSpeedRezInterval);
+	gSavedSettings.setBOOL("LiruUseContextMenus", mUseContextMenus);
 	gSavedSettings.setBOOL("UseWebProfiles", mUseWebProfiles);
 	gSavedSettings.setBOOL("UseWebSearch", mUseWebSearch);