* FEM: remove calculix from solvers
* FEM: remove calculix from joint with ccxtools if branches
* FEM: remove calculix from its if
* FEM: fix cxx typo in translations
* FEM: fix cxx typo in classes name
* FEM: fix ccx typo in shortcuts
* FEM: convert FEM_*CcxTools to CamelCase
* FEM: remove tests related to calculix
* FEM: remove test_solver_calculix.py from Fem/CMakeLists.txt
* FEM: convert all 'CalculiXccxTools' to 'CalculiXCcxTools'
* FEM: revert changes in all *_*.ts files
* FEM: convert 'SolverCcxtools' to 'SolverCcxTools'
* FEM: convert remaining 'Ccxtools' to 'CcxTools'
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