Change "TODO" filter to not show softfails with no failed modules
As a test reviewer aiming for black certificates I want the "TODO" query to not show me softfails with no failed modules so that I see only jobs which I really need to review.
- AC1: The TODO filter shows only jobs that need to be labeled for the black certificate icon to show up
- adapt todo filter to what is used for showing the certificate
- update help on webui
- update documentation with explanation of the whole workflow proposal how to use this feature as a "TODO-list" and describe the filter checkbox
- optional: extend 'TODO=1' to more modes, e.g. multiple levels