Ryan Leavengood 59347b7f1b Reverse the meaning of BWindow fShowLevel to match BView.
This also matches the client_window_info.show_hide_level field used in Deskbar
and other applications.

While doing this, keep fShowLevel fully in sync between BWindow and app_server,
use one message type for both hiding and showing, and make the decision to show
and hide the window in the app_server.

Lastly make minimize behave as described in the Be Book: hidden windows cannot
be minimized, and minimized windows which get hidden become unminimized.
2012-08-15 23:45:15 -04:00
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