Various fixes to smoother output

1. Fixes crashes due to unset input arguments
2. Prevents crash in inversion filter due to unavailable options
3. Fixes PKF with filter_step_ahead=1

added bug label

@rattoma Can you confirm that f086c2f8 is the correct fix?

enabled an automatic merge when the pipeline for f086c2f8 succeeds

added occbin label

@rattoma Given your last comment, shall I cancel the automated merge of this?

canceled the automatic merge

@rattoma I’ve canceled the automatic merge. Please let me know once you think this MR is in the correct shape.

added 1 commit

• 28165502 - PKF: get required output if nk=1

Compare with previous version

The above message is actually intended for @JohannesPfeifer. Sorry for the confusion.

@sebastien I amended the commit

enabled an automatic merge when the pipeline for 28165502 succeeds

mentioned in commit f7ea4313

merged