d9e2adaaf9
Oversight in 411c5238a2 ignored sticky selection.
Use 'uvedit_edge_select_set_with_sticky' to make sure
sticky options are respected.
Also skip checking the existing selection since that only checks the
current UV, not all connected UV's which is needed for sticky selection.
The extra checks to avoid updating UV's isn't such an advantage as
only meshed in the selected region are tagged for updating.