Merge pull request #6953 from spycrab/qt_map_unresponsive

Qt/MappingButton: Fix window becoming unresponsive after mapping

Source/Core/DolphinQt2/Config/Mapping/MappingButton.cpp

@@ -106,7 +106,6 @@ void MappingButton::Detect()
 
   installEventFilter(BlockUserInputFilter::Instance());
   grabKeyboard();
-  grabMouse();
 
   // Make sure that we don't block event handling
   std::thread thread([this] {
@@ -169,7 +168,6 @@ void MappingButton::Detect()
                                              m_parent->GetController()->GetDefaultDevice());
     }
 
-    releaseMouse();
     releaseKeyboard();
     removeEventFilter(BlockUserInputFilter::Instance());