Add stats filter to task list view

[hotzenklotz]

PR does two things:

• Prioritized the stats column in the table by moving it towards the beginning of the table instead of the last position which is often cut off
• Added a filter to the stats column to quickly filter for tasks with "Prending", "In-Progress" or "Finished" instances

URL of deployed dev instance (used for testing):

• https://___.webknossos.xyz

Steps to test:

• Create new tasks
• Go to Task List View
• Filter away

Issues:

• None

---

(Please delete unneeded items, merge only when none are left open)

• Updated changelog
• Updated migration guide if applicable
• Updated documentation if applicable
• Adapted wk-libs python client if relevant API parts change
• Removed dev-only changes like prints and application.conf edits
• Considered common edge cases
• Needs datastore update after deployment

[fm3]

Works for me :)

Could you replace the wording "in progress" by "active", in order to use the same term everywhere rather than introduce another synonym?