Fix CallListeners scope issue in RmlUi event listeners

Capture CallListeners as local variable in BindFieldEvents so it's
available in event listener callback closures. Fixes error when
clicking action buttons in RmlUi mode.

Author: claude

scen_edit/view/view.lua

@@ -396,6 +396,9 @@ function View:BindFieldEvents(editor)
         return
     end
 
+    -- Capture CallListeners in local scope for event listener callbacks
+    local callListeners = CallListeners
+
     -- Bind change events for fields
     if editor.fields then
         for fieldName, field in pairs(editor.fields) do
@@ -427,7 +430,7 @@ function View:BindFieldEvents(editor)
             if btnElement then
                 btnElement:AddEventListener("click", function(event)
                     if button.OnClick then
-                        CallListeners(button.OnClick)
+                        callListeners(button.OnClick)
                     end
                 end)
             end
@@ -441,7 +444,7 @@ function View:BindFieldEvents(editor)
             if btnElement then
                 btnElement:AddEventListener("click", function(event)
                     if button.OnClick then
-                        CallListeners(button.OnClick)
+                        callListeners(button.OnClick)
                     end
                 end)
             end