Quote alternative names in alternative filter shorthand

[soininen]

Alternative names may have time stamps that contain colons ':' that mess up the shorthand version unless we quote the names.

Fixes #220

Checklist before merging

• [x] Documentation (also in Toolbox repo) is up-to-date
• [x] Release notes in Toolbox repo have been updated
• [x] Unit tests have been added/updated accordingly
• [x] Code has been formatted by black
• [x] Unit tests pass