Visualize what's going on with tst_QTextCursor::insertMarkdown() at least.
But this could be expanded for other purposes.
It's also interesting to test drag-and-drop with this. And you can save
the result to any supported text format.
Change-Id: I363c32ff9b1bd7c53c562b08c58de95a69be0aa9
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
