Hot reload of dev builds seems broken

[originalfoo]

Tried doing a hot reload and the main menu button (crown button) stopped functioning.

TMPE.log

Error 10,971.8881554: Toggle mainmenu failed System.NullReferenceException: Object reference not set to an instance of an object
  at TrafficManager.UI.MainMenu.MainMenuButton.HandleClick (ColossalFramework.UI.UIMouseEventParameter p) [0x00000] in <filename unknown>:0 
   at CSUtil.Commons.Log.LogToFile(System.String log, LogLevel level)
   at CSUtil.Commons.Log.Error(System.String s)
   at TrafficManager.UI.MainMenu.MainMenuButton.HandleClick(ColossalFramework.UI.UIMouseEventParameter p)
   at TrafficManager.U.Button.BaseUButton.OnClick(ColossalFramework.UI.UIMouseEventParameter p)
   at ColossalFramework.UI.UIComponent.OnClick(ColossalFramework.UI.UIMouseEventParameter p)
   at ColossalFramework.UI.UIInput+MouseHandler.ProcessInput(IInputTranslator translator, Ray ray, ColossalFramework.UI.UIComponent component, Boolean retainFocusSetting)
   at ColossalFramework.UI.UIInput.ProcessMouseInput()
   at ColossalFramework.UI.UIInput.Update()

Suspect it might be related to the UI updates from #656

[originalfoo]

Note: Both the existing and updated builds were RELEASE LABS - not sure if that has any effect?

[kianzarrin]

Related #730

[kianzarrin]

I have been struggling with the freaking UI for my road selection panel for a month ... this is not my strong suite! looking at the error log it does not seem hard to fix. I will have a look

[originalfoo]

@kianzarrin Is this separate issue to that fixed in #764 ?

[kianzarrin]

yes

[kianzarrin]

#1492 also fixed this.