Turns out the whole "active app" mechanism in the registrar wasn't used at all; the

Switcher now works as expected.
* Renamed TRoster::ActivateApp() to UpdateActiveApp(), as the app is already activated
  at that point (the registrar only keeps track of it).
* BWindow::DispatchMessage() now calls the new BRoster::Private::UpdateActiveApp()
  method when it receives a B_WINDOW_ACTIVATED message.
* Added BRoster::_UpdateActiveApp() which calls the new B_REG_UPDATE_ACTIVE_APP.
* Removed now unused B_REG_ACTIVATE_APP.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19857 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/app/Roster.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2001-2006, Haiku.
+ * Copyright 2001-2007, Haiku.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -146,7 +146,7 @@ class BRoster {
 					const BList *messageList, int argc,
 					const char *const *args,
 					team_id *appTeam) const;
-		bool _UpdateActiveApp(team_id team) const;
+		status_t _UpdateActiveApp(team_id team) const;
 		void _SetAppFlags(team_id team, uint32 flags) const;
 		void _DumpRoster() const;
 		status_t _ResolveApp(const char *inType, entry_ref *ref, entry_ref *appRef,