Description:
saving the presentation, either with ctrl-s or when the autosaving kicks in, while editing an active text box in libreoffice impress causes 100% cpu for at least a minute, the ui grays out, and becomes very unresponsive (even not making window redraw).

Steps to Reproduce:
1. create a text box, write something, leave the cursor in
2. hit ctrl-s to save, this step lasts for ever, when i already have ~20 slides done
3. click out of the text box to deselect, repeat ctrl-s, this is much faster

Actual Results:
slow when cursor inside a text box

Expected Results:
the save or autosave operations should not depend on whether the text box is currently being edited or not


Reproducible: Always


User Profile Reset: No

Additional Info:
should be fast irrespective, just like when the text box is not in edit mode