A new checkbox has been added to the legend settings to control
whether or not a legend should be automatically resized to fit
its contents.
If unchecked, then the legend will never resize and instead just
stick to whatever size the user has set. Any content which
doesn't fit the size is cropped out.
Refs #10556
On behalf of Faunalia, sponsored by ENEL
When a legend was set to filter content by map, it wasn't
consistently being resized to fit the legend contents. This caused
issues for atlas exports where legends could grow but never
shrink.
Fix#14707
On behalf of Faunalia, sponsored by ENEL
