* Feature #11817: Show authors field in object selection
- authors field in JSON shows as last line in bottom right on object selection
- authors field added to Object class
- ObjectFileIndex version bump as authors is serialised
* fix sign comparison warning
* Start object selection corner text higher to avoid overlap
* Use references to reduce unneccessary copies
* make GetAuthors const
* Clip drawing of authors string so it doesn't cross widgets
At max length the leftmost aligns exactly with description left
* Add a changelog message
* make SetAuthors use an rvalue reference
* remove unnecessary nullptr check