Handle activateWindow in LFUN_BUFFER_SWITCH like in saveBufferIfNeeded() and doShowDialog() methods.

This is a requirement on Mac to get the current buffer view topmost after buffer switch.

src/frontends/qt4/GuiView.cpp

@@ -3615,7 +3615,9 @@ void GuiView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 			for (; i != ids.size(); ++i) {
 				GuiView & gv = guiApp->view(ids[i]);
 				if (gv.workArea(*buffer)) {
+					gv.raise();
 					gv.activateWindow();
+					gv.setFocus();
 					gv.setBuffer(buffer);
 					break;
 				}

status.22x

@@ -57,6 +57,8 @@ What's new
 - Fix display of collapsable insets when the same document is shown in
   two views with different width (bug 9756).
 
+- Raise GuiView on buffer switch to bring it topmost in multi-window mode.
+
 
 * INTERNALS