Toggling to bordeless and back on mac has no resize buttons

[richardeakin]

First reported on forum here, repro'd with this gist. Hit b twice and you have no resize buttons.

[axjxwright]

If a window title is set, it also disappears when returning from borderless mode. I'm able to get the buttons to return by manually resizing the window, or programmatically by calling [mWin setFrame] to a different size and then back again. Unfortunately this results in an ugly pop, so it's not a good solution. mWin also appears to deallocate its title string upon entering borderless mode, so you can't just call [self setTitle:[self getTitle]] to get it to come back, either. Long story short, boo at yosemite.