restore inputfocus after assigning window shortcut

BUG: 314760
FIXED-IN: 4.10.1
REVIEW: 108887

kwin/useractions.cpp

@@ -897,6 +897,8 @@ void Workspace::setupWindowShortcutDone(bool ok)
     client_keys_dialog->deleteLater();
     client_keys_dialog = NULL;
     client_keys_client = NULL;
+    if (active_client)
+        active_client->takeFocus(Allowed);
 }
 
 void Workspace::clientShortcutUpdated(Client* c)