Merge pull request #6709 from JosJuice/qt-controls-clear

DolphinQt2: Fix clearing numeric values in controller config

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

@@ -26,7 +26,7 @@ void MappingNumeric::Connect()
 
 void MappingNumeric::Clear()
 {
-  m_setting->SetValue(m_setting->m_low + (m_setting->m_low + m_setting->m_high) / 2);
+  m_setting->SetValue(m_setting->m_default_value);
   m_parent->SaveSettings();
   Update();
 }