Pull request #790: CAS-13719
Merge in CASA/casa6 from CAS-13719 to master
* commit '30b7d8d2c562a14ba7fe32512f908732244a9614':
remove .DS_Store files from code tree
Finalize CAS-13719, with change for CAS-13298
Added remaining XML changes from CAS-13719
Updated XML simobserve, parameter incenter. Running commit to check if all works as expected before updating other XML files.
Added punctuation to task description (as a test)
