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/skins/default/xui/en-us/notifications.xml

@@ -7752,6 +7752,18 @@ You uploaded a [RESOLUTION] baked texture for '[BODYREGION]' after [TIME] second
 You locally updated a [RESOLUTION] baked texture for '[BODYREGION]' after [TIME] seconds.
   </notification>
 
+  <notification
+   icon="alertmodal.tga"
+   name="LivePreviewUnavailable"
+   type="alert">
+
+We cannot apply this texture immediately because it is no-copy and/or no-transfer.
+  <usetemplate
+    ignoretext="Warn me that Apply Texture Immediately mode is not available for no-copy and/or no-transfer textures"
+    name="okignore"
+    yestext="OK"/>
+  </notification>
+
   <notification
    icon="notify.tga"
    name="FirstAO"

indra/newview/skins/default/xui/en-us/strings.xml

@@ -305,6 +305,7 @@
 
 	<!-- build floater -->
 	<string name="multiple_textures">Multiple</string>
+	<string name="use_texture">Use texture</string>
 
 	<!-- world map -->
 	<string name="texture_loading">Loading...</string>