ControllerEmu: Allow settings to be categorized as "advanced". Make "Virtual Notches" and "Gate Size" categorized as such.

Source/Core/InputCommon/ControllerEmu/ControlGroup/ControlGroup.cpp

@@ -32,7 +32,8 @@ void ControlGroup::AddVirtualNotchSetting(SettingValue<double>* value, double ma
   AddSetting(value,
              {_trans("Virtual Notches"),
               // i18n: The degrees symbol.
-              _trans("°"), _trans("Snap the thumbstick position to the nearest octagonal axis.")},
+              _trans("°"), _trans("Snap the thumbstick position to the nearest octagonal axis."),
+              nullptr, SettingVisibility::Advanced},
              0, 0, max_virtual_notch_deg);
 }