Rationale:
- there was a lot of large objects passed by value, so potentially
there's a speed bump from this
- even for implicitly shared classes like QString/QList there's still
a (small) cost for copying the objects when there's no reason to
- it's the right thing to do!
The feature can be toggled individually for groups - in layer tree view context menu.
This code has been funded by Tuscany Region (Italy) - SITA (CIG: 63526840AE) and commissioned to Gis3W s.a.s.
I have managed to break that with implementation of #11369.
Obviously it is a bad idea to change selection in a slot connected to model's rowsInserted signals
because the drag'n'drop does not work properly anymore. Now registry bridge will emit a signal after
new layers have been added, so the selection change at that point should be safe.
* respect the 'auto enable otf' setting
* don't ask if otf is off or for layers without geometry
* ask when otf was switched on
* show more information in selection dialog
