fix(libs): restore ElvUI-namespaced Ace3 stack clobbered by sweep

The coa-ace3 sweep (commits 0c130e0..5ea6e44, before coa-elvui was added to
EXCLUDED_FORKS in coa-ace3 tools/sweep.py) overwrote ElvUI's customized,
-ElvUI-namespaced Ace3 libs with plain canonical ones. ElvUI registers libs
as AceLocale-3.0-ElvUI and the AceConfig-3.0-ElvUI family (plus -ElvUI
widgets that don't exist in canonical), so the clobber left them
unregistered: ElvUI failed to init (16 locale 'L' errors) and /ec would not
open. Restores ElvUI/Libraries/Ace3/AceLocale-3.0 and the
ElvUI_OptionsUI/Libraries/Ace3 stack to their pre-sweep state (5021fd1).
coa-elvui is now in EXCLUDED_FORKS, so this won't be re-clobbered.

ElvUI_OptionsUI/Libraries/Ace3/AceGUI-3.0/widgets/AceGUIWidget-Keybinding.lua

@@ -2,7 +2,7 @@
 Keybinding Widget
 Set Keybindings in the Config UI.
 -------------------------------------------------------------------------------]]
-local Type, Version = "Keybinding", 27
+local Type, Version = "Keybinding", 25
 local AceGUI = LibStub and LibStub("AceGUI-3.0", true)
 if not AceGUI or (AceGUI:GetWidgetVersion(Type) or 0) >= Version then return end
 
@@ -13,6 +13,10 @@ local pairs = pairs
 local IsShiftKeyDown, IsControlKeyDown, IsAltKeyDown = IsShiftKeyDown, IsControlKeyDown, IsAltKeyDown
 local CreateFrame, UIParent = CreateFrame, UIParent
 
+-- Global vars/functions that we don't upvalue since they might get hooked, or upgraded
+-- List them here for Mikk's FindGlobals script
+-- GLOBALS: NOT_BOUND
+
 --[[-----------------------------------------------------------------------------
 Scripts
 -------------------------------------------------------------------------------]]
@@ -31,14 +35,12 @@ local function Keybinding_OnClick(frame, button)
 		if self.waitingForKey then
 			frame:EnableKeyboard(false)
 			frame:EnableMouseWheel(false)
-			frame:EnableGamePadButton(false)
 			self.msgframe:Hide()
 			frame:UnlockHighlight()
 			self.waitingForKey = nil
 		else
 			frame:EnableKeyboard(true)
 			frame:EnableMouseWheel(true)
-			frame:EnableGamePadButton(true)
 			self.msgframe:Show()
 			frame:LockHighlight()
 			self.waitingForKey = true
@@ -74,7 +76,6 @@ local function Keybinding_OnKeyDown(frame, key)
 
 		frame:EnableKeyboard(false)
 		frame:EnableMouseWheel(false)
-		frame:EnableGamePadButton(false)
 		self.msgframe:Hide()
 		frame:UnlockHighlight()
 		self.waitingForKey = nil
@@ -122,7 +123,6 @@ local methods = {
 		self:SetDisabled(false)
 		self.button:EnableKeyboard(false)
 		self.button:EnableMouseWheel(false)
-		self.button:EnableGamePadButton(false)
 	end,
 
 	-- ["OnRelease"] = nil,
@@ -188,7 +188,7 @@ local function Constructor()
 	local name = "AceGUI30KeybindingButton" .. AceGUI:GetNextWidgetNum(Type)
 
 	local frame = CreateFrame("Frame", nil, UIParent)
-	local button = CreateFrame("Button", name, frame, "UIPanelButtonTemplate")
+	local button = CreateFrame("Button", name, frame, "UIPanelButtonTemplate2")
 
 	button:EnableMouse(true)
 	button:EnableMouseWheel(false)
@@ -199,12 +199,10 @@ local function Constructor()
 	button:SetScript("OnKeyDown", Keybinding_OnKeyDown)
 	button:SetScript("OnMouseDown", Keybinding_OnMouseDown)
 	button:SetScript("OnMouseWheel", Keybinding_OnMouseWheel)
-	button:SetScript("OnGamePadButtonDown", Keybinding_OnKeyDown)
 	button:SetPoint("BOTTOMLEFT")
 	button:SetPoint("BOTTOMRIGHT")
 	button:SetHeight(24)
 	button:EnableKeyboard(false)
-	button:EnableGamePadButton(false)
 
 	local text = button:GetFontString()
 	text:SetPoint("LEFT", 7, 0)
@@ -216,7 +214,7 @@ local function Constructor()
 	label:SetJustifyH("CENTER")
 	label:SetHeight(18)
 
-	local msgframe = CreateFrame("Frame", nil, UIParent, "BackdropTemplate")
+	local msgframe = CreateFrame("Frame", nil, UIParent)
 	msgframe:SetHeight(30)
 	msgframe:SetBackdrop(ControlBackdrop)
 	msgframe:SetBackdropColor(0,0,0)