fix mousueover for many ui addons and add many more to support them

Extensions/Mouseover/Grid.lua

@@ -6,17 +6,16 @@ local _G = _G or getfenv(0)
 local CleveRoids = _G.CleveRoids or {}
 
 CleveRoids.Hooks = CleveRoids.Hooks or {}
-CleveRoids.mouseoverUnit = CleveRoids.mouseoverUnit or nil
 
 local Extension = CleveRoids.RegisterExtension("Grid")
 Extension.RegisterEvent("ADDON_LOADED", "OnLoad")
 
 function Extension.OnEnter(unit)
-    CleveRoids.mouseoverUnit = unit
+    CleveRoids.SetMouseoverFrom("grid", unit)
 end
 
 function Extension.OnLeave()
-    CleveRoids.mouseoverUnit = nil
+    CleveRoids.ClearMouseoverFrom("grid")
 end
 
 function Extension.OnLoad()
@@ -111,4 +110,4 @@ function CleveRoids:GrdCreateFrames()
 	ClickCastFrames[self.frame] = true
 end
 
-_G["CleveRoids"] = CleveRoids
+_G["CleveRoids"] = CleveRoids