Only send key press events to the moving client

The invoked method is called keyPressEvent, thus it should not get
key release events. Before each key event was handled twice.

input.cpp

@@ -1004,11 +1004,14 @@ void InputRedirection::processKeyboardKey(uint32_t key, InputRedirection::Keyboa
     }
     if (workspace()) {
         if (AbstractClient *c = workspace()->getMovingClient()) {
+            // TODO: handle key repeat
+            if (state == KeyboardKeyPressed) {
                 c->keyPressEvent(m_xkb->toQtKey(m_xkb->toKeysym(key)) | m_xkb->modifiers());
                 if (c->isMove() || c->isResize()) {
                     // only update if mode didn't end
                     c->updateMoveResize(m_globalPointer);
                 }
+            }
             return;
         }
         // TODO: Maybe it's better to select the top most visible internal window?