Activate already showing, possibly unfocused window if Backgrounds gets launched while already running. Small clean-up.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33942 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/preferences/backgrounds/Backgrounds.cpp

@@ -27,7 +27,8 @@ class BackgroundsWindow : public BWindow {
 
 protected:
 	virtual	bool			QuitRequested();
-		virtual void WorkspaceActivated(int32 oldWorkspaces, bool active);
+	virtual	void			WorkspaceActivated(int32 oldWorkspaces,
+								bool active);
 
 			BackgroundsView*	fBackgroundsView;
 };
@@ -36,6 +37,7 @@ class BackgroundsWindow : public BWindow {
 class BackgroundsApplication : public BApplication {
 public:
 							BackgroundsApplication();
+	virtual	void			MessageReceived(BMessage* message);
 	virtual	void			RefsReceived(BMessage* message);
 
 private:
@@ -55,6 +57,20 @@ BackgroundsApplication::BackgroundsApplication()
 }
 
 
+void
+BackgroundsApplication::MessageReceived(BMessage* message)
+{
+	switch (message->what) {
+		case B_SILENT_RELAUNCH:
+			fWindow->Activate();
+			break;
+		default;
+			BApplication::MessageReceived(message);
+			break;
+	}
+}
+
+
 void
 BackgroundsApplication::RefsReceived(BMessage* message)
 {
@@ -88,6 +104,7 @@ void
 BackgroundsWindow::RefsReceived(BMessage* message)
 {
 	fBackgroundsView->RefsReceived(message);
+	Activate();
 }