Mats UI.

Includes Chalice Yao's pause agent on attachment selection in LLSelectMgr::updateSelectionCenter()
Includes some of Cinder Roxley's enhancements to the build floater for materials (flip buttons, sync materials, consistent control hiding)
Includes Ansariel Hiller's fix for FIRE-8298 [BUG-869] [MAINT-1961], since this updates lltexturectrl.* to have related behaviors.
Switches from using MIN_MANHATTAN_DIST for threshold in LLToolDragAndDrop to using the existing DragAndDropDistanceThreshold debug, like upstream.

Translators:
panel_tools_texture.xml should now be translated, floater_tools.xml should have the old panel removed.
strings.xml now has "use_texture" string.
notifications.xml Now has "LivePreviewUnavailable" alert. (don't forget to translate the ignoretext)

indra/newview/llfloatertools.h

@@ -111,6 +111,8 @@ public:
 	void navigateToTitleMedia( const std::string url );
 	bool selectedMediaEditable();
 
+	LLPanelFace* getPanelFace() { return mPanelFace; }
+
 private:
 	void refresh();
 	void refreshMedia();