Sketcher: Intercurve fillet Improvement and delete constraint on point fix
Sketcher: Intercurve fillet Improvement and delete constraint on point fix

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Intercurve fillet uses endpoint constraints for improved accuracy, but before this
commit was only considering a coincident constraint. Now it also considers an endpoint
tangency or perpendicular.

delConstraintOnPoint with coincidentonly=false, was not checking endpoint perpendiculars and
would therefore fail to delete them.

https://forum.freecadweb.org/viewtopic.php?f=3&t=31594&start=30#p265731

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