fakevim: make Ctrl-c work in insert and ex mode

src/plugins/fakevim/fakevimhandler.cpp

@@ -1475,7 +1475,7 @@ EventResult FakeVimHandler::Private::handleCommandMode(int key, int unmodified,
 EventResult FakeVimHandler::Private::handleInsertMode(int key, int,
     const QString &text)
 {
-    if (key == Key_Escape || key == 27) {
+    if (key == Key_Escape || key == 27 || key == control('c')) {
         // start with '1', as one instance was already physically inserted
         // while typing
         QString data = m_lastInsertion;
@@ -1573,7 +1573,7 @@ EventResult FakeVimHandler::Private::handleMiniBufferModes(int key, int unmodifi
 {
     Q_UNUSED(text)
 
-    if (key == Key_Escape) {
+    if (key == Key_Escape || key == control('c')) {
         m_commandBuffer.clear();
         enterCommandMode();
         updateMiniBuffer();