Clean quote when canceling edit message.

app/src/main/java/org/thoughtcrime/securesms/components/InputPanel.java

@@ -447,6 +447,7 @@ public class InputPanel extends ConstraintLayout
       composeText.setText("");
       messageToEdit = null;
       quoteView.setMessageType(QuoteView.MessageType.PREVIEW);
+      clearQuote();
     }
     updateEditModeUi();
   }