[Window] Bugfixes in pull() code

[Window] Bugfixes in pull() code

This fixes numerous bugs in the pull() code. Some window properties were
being reset by Metacity when the window was hidden, so we must re-set them
every single time the window is re-shown. Lame.

Also, Metacity iconified (minimized) the window if it was pulled down on
one workspace, pulled up while on another workspace, then pulled down on
the current workspace. We'll have to work around that (stupid) behavior
too. Doubly lame.