Skin the CoA Vanity tab (StoreCollectionFrame)

Skins the outer window, close button, search box, Filter dropdown
(and its arrow and popup panel), Purchase/Deliver buttons, and the
grid pager arrows. Removes nothing else -- the portrait originally
suspected at the top-left corner turned out not to exist as a
separate element, and the card grid/preview panel are left native.

core.lua

@@ -382,6 +382,10 @@ function CoA:Initialize()
 	if self.InitializeTalentFrame then
 		self:InitializeTalentFrame()
 	end
+
+	if self.InitializeVanityFrame then
+		self:InitializeVanityFrame()
+	end
 end
 
 local function InitializeCallback()