This operator allows to set the start point for any cyclic stroke.
This is very handy to fit interpolation issues or
use thickness modifier.
Note: There is small change in this commit to fix
a typo error in the name of the operator.
Reviewed By: mendio, frogstomp
Maniphest Tasks: T100827
Differential Revision: https://developer.blender.org/D15881
98c4e1e590