fix: install CbmConfigBase.h, small change in geometry setting, add major CbmStackFilter settings

1. fix: install missing header for CbmSimSteer library
2. small change in geometry setting
3. major CbmStackFilter settings added

approved this merge request

assigned to @v.friese

changed milestone to %APR21

added BugFix Simulation labels

Dear @f.uhlig, @v.friese, @p.-a.loizeau,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

merged