todo

Ideas lists for next versions:

• check why sometimes selection is not taken into account.

• do not use a condionnal expression to mask CallOut, users get disappointed when trying to change Callout Color.

• Add options to let the CallOut color follow Label color

• check if mem Layer is correctly indexed (spatial and attributes)

-see if it is possible to let labeling engine check multiple locations like for point features. Line feature with horizontal labeling option is more than suboptimal

• log why pinning labels sometimes displace theme far away, and not always in the same place.