PrefixLayer: clear only modifiers during prefix

Signed-off-by: iliana etaoin <iliana@buttslol.net>

plugins/Kaleidoscope-PrefixLayer/src/kaleidoscope/plugin/PrefixLayer.cpp

@@ -56,11 +56,9 @@ EventHandlerResult PrefixLayer::onKeyEvent(KeyEvent &event) {
 }
 
 EventHandlerResult PrefixLayer::onAddToReport(Key key) {
-  if (current_prefix_ != Key_NoKey) {
+  if (current_prefix_ != Key_NoKey && current_prefix_ != key && key.isKeyboardModifier()) {
-    if (current_prefix_ != key) {
     return EventHandlerResult::ABORT;
   }
-  }
 
   return EventHandlerResult::OK;
 }