as reported in https://tracker.freecadweb.org/view.php?id=3818
we treat the blind hole depth not according to the conventions. The size of the drill point due to the angle is normally not taken into account but FC does this in any case.
This PR adds therefore an option, that is by default off, to take the drill point size into account.
Without the option, (the new default) the depth is calculated according to the conventions.
The PR also removes unused widgets and restored the tab order in the .ui file. The thread parameters were never used. In case we made in future the decision to carve into holes real (modeled) threads, we need a special UI for that solution anyway so having the dead code in is not helpful at all.
The given parameters return an invalid shape. This fails with occt7.4 but doesn't with occt7.3. If the angle is 45 degree the cone is self-intersecting as Hole.Depth > Hole.Diameter/2. Changing the Hole.TaperedAngle to 60 degree solves this issue.
This is the first feature that used GeoFeatureGroupExtension and required links to the groups inside as well as to things on the same level. Hence a few modifications to link scopes have been nesseccary.
