Fixed a warning in BaseLib/ConfigTreeUtil.cpp

See merge request ogs/ogs!3340

Rewrite AngleSkewMetric and code improvements using Eigen

See merge request ogs/ogs!3327

[ThirdParty] Update to new revision of Xdmf library with updated license in Readme

See merge request ogs/ogs!3338

<MPL> Medium throws an error if a property is not defined in the input file

See merge request ogs/ogs!3337

Fix ghost element test

See merge request ogs/ogs!3336

Simulation input (partitioning of the mesh) has changed. This leads to changed
output files.

The ghost node data handling was corrected in a merge request some time ago.
Changing the ghost node information requires an update of the partitioned file.

Better ctest dependencies and gui utils tests

See merge request ogs/ogs!3323

Moved global preprocessor definitions to targets

See merge request ogs/ogs!3330