correct bug in topology rubberband when OTF is enabled
Correct topology rubber band bug for first and last vertexes
Merge pull request #975 from leyan/topology_bug_2

Correct topology rubber band bug for first and last vertexes
Ensure map is centered when updating map extent (fix #6988)
Merge pull request #974 from leyan/topology_bug

correct bug in topology rubberband when OTF is enabled
add LayerSelection idetinfy mode in SIP