MacOS: Fix TextEditor when using marked text (e.g. Korean)

modules/juce_gui_basics/native/juce_mac_NSViewComponentPeer.mm

@@ -1531,6 +1531,15 @@ public:
 
     void textInputRequired (Point<int>, TextInputTarget&) override {}
 
+    void dismissPendingTextInput() override
+    {
+        stringBeingComposed.clear();
+        const auto* inputContext = [NSTextInputContext currentInputContext];
+
+        if (inputContext != nil)
+            [inputContext discardMarkedText];
+    }
+
     void resetWindowPresentation()
     {
         if (hasNativeTitleBar())

modules/juce_gui_basics/widgets/juce_TextEditor.cpp

@@ -1836,6 +1836,9 @@ void TextEditor::mouseDown (const MouseEvent& e)
         {
             moveCaretTo (getTextIndexAt (e.x, e.y),
                          e.mods.isShiftDown());
+
+            if (auto* peer = getPeer())
+                peer->dismissPendingTextInput();
         }
         else
         {
@@ -1956,6 +1959,10 @@ bool TextEditor::moveCaretWithTransaction (const int newPos, const bool selectin
 {
     newTransaction();
     moveCaretTo (newPos, selecting);
+
+    if (auto* peer = getPeer())
+        peer->dismissPendingTextInput();
+
     return true;
 }