I'm sure this has been asked/suggested before, but I couldn't find it anywhere.
My suggestion is:
Along with the form design window, have a dedicated area to place non-visual and standard-placement components like popup menus and tray icons. As it is now, I had just been placing these randomly on the form living with the annoyance until somebody in another IRC forum suggested I just pull them off-form to keep them from cluttering up the place. That worked out pretty fine, but I'd still like a visual reminder they are there (I know, I know, there they are in the object inspector...). My reference is how Code::Blocks does it with wxSmith. See here:
http://s24.postimg.org/6m5zt8rcl/codeblockswxsmithnonvisual.pngSee how the main menu, statusbar and toolbar all go in a little panel thingummy? Nice and tidy.
I understand that with the form designer being a floating window, this may be hard to implement, but I think it'd be a neat feature someday.