Link/Checklist: Filter per zone/comment/agent/state and color filtered (listed) links

[le-jeu]

Currently a PoC for filtering checklist and anchor link list with the ability to color all filtered links.

Missing: ~style~, tests

[le-jeu]

This looks to me, but coloring links is one part of bulk changes we can imagine.

• Assign all tasks in zone X to player A (and B,C when multiple assignments)
• Mark as Completed tasks for player A, in zone B or from portal C

This PR filters tasks using strings, but a similar UI could allow to select tasks, then apply change to all selected tasks, with filters in order to help finding the tasks

I think this would benefit from a specific dialog instead of polluting the checklist. I agree this looks like the reinventing some spreadsheet features

[le-jeu]

superseded by #358