* Add test causing crash and fix map sorting function.
When opening a model from FreeCAD 0.7, the model would crash when I
changed some of the parameters. This turned out to be due to the
ElementNameComparator::operator() not correctly sorting the items going
into the map, which caused the map to be invalid.
This change adds a test that represented the exact names causing the
crash as well as a fix for the problem. Names are now sorted:
1. Empty names first
2. Identifier based names second.
3. Hex based names last.
Identifiers are sorted lexicographically for the name portion and
numerically for the number portion, smallest to largest.
Hex based names are sorted by the value of the hex number, smallest to
largest.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* Fix lint issues.
* Add another test form to the mix.
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
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