Stop storing ref to e2funcs(fixes nil access after e2 refresh)

lua/wire/client/e2helper.lua

@@ -113,8 +113,19 @@ end
 delayed(1,function()
 	local E2Mode = E2Helper:RegisterMode("E2")
 	if E2Mode then
-		E2Mode.Descriptions = E2Helper.Descriptions
-		E2Mode.Items = wire_expression2_funcs -- May be worth replacing this with a metatable to fetch the table from global.
+		local E2ModeMetatable = {
+			__index = function(self,key)
+				if key == "Items" then return wire_expression2_funcs end
+				if key == "Descriptions" then return E2Helper.Descriptions end
+				return nil
+			end
+		}
+		E2Mode.Items = nil
+		E2Mode.Descriptions = nil
+		-- The metatable is needed because storing a ref to wire_expression2_funcs
+		-- and then causing e2 to reload (like changing extensions) doesn't update the ref
+		-- or something like that, it causes e2helper to access nil values.
+		setmetatable(E2Mode,E2ModeMetatable)
 		E2Mode.ModeSetup = function(E2HelperPanel)
 			E2HelperPanel.FunctionColumn:SetName("Function")
 			E2HelperPanel.FunctionColumn:SetWidth(126)