Resizing issues

There are several glitches when you try to resize the window:
- If you resize the window using your window manager's capabilities, guake ignores the actual window size when you try to resize it using guake's shortcuts afterwards. It would be nice to see the window's dimensions being well-defined. That is, every time I use the window manager to resize (or maximize/restore) the window guake should automatically resize the window so that the resulting dimensions are close to the requested dimensions as well as compatible to guake's own constraints.
- If "Bottom align window instead of top align" is enabled the divider (i.e. the small bar you use to resize the window using your mouse) behaves as if the window is still being aligned to the top which is really strange.
- Also, if "Bottom align window instead of top align" is enabled said divider should appear at the top of the window instead of at the bottom.