fix(handwriting): avoid cancelling active keys when hidden

Author: AsafMah

app/src/main/java/helium314/keyboard/keyboard/KeyboardSwitcher.java

@@ -361,8 +361,10 @@ private void setMainKeyboardFrame(
         mClipboardHistoryView.setVisibility(View.GONE);
         mClipboardHistoryView.stopClipboardHistory();
         if (mHandwritingView != null) {
+            if (mHandwritingView.isShown()) {
+                mHandwritingView.stopHandwriting();
+            }
             mHandwritingView.setVisibility(View.GONE);
-            mHandwritingView.stopHandwriting();
         }
 
         if (PointerTracker.sPersistentTouchpadModeActive) {