[Feature Request] Support for Text-boxes and Shapes

[Asten-Valentinus]

Adding support for text-boxes and shapes would expand support to LibreOffice Draw and Impress. It would also affect LibreOffice Writer, as floating text-boxes can be added there as well.

This would only effect the text of the text-box (or shape) currently being edited. Support for this would significantly increase the versatility of this extension.