Allow creating saved annotations by searching annotations

[jorg-vr]

This pull request tries to remove the need for anticipation of reuse when saving annotations. A saved annotation can easily be created by searching the list of existing annotations.

Clicking the link under the saved annotations searchfield:

Brings the user the the prefiltered saved annotations list page

This page now has a + button to create new saved annotations. This + button links to the prefiltered list of annotations:

These can of course be filtered or sorted as desired.

Here a user can easily save the annotation (I reused the existing modal for this)

The saved annotation detail page now also uses this list view of annotations instead of a list of submission:

This pr also contains:

• bug fix: saved annotation titles sometimes incorrectly detected a duplicate
• chore: the tracking of userId in the frontend to filter saved annotations is removed. The policy already always filters by current user.

Part of #4564

[bmesuere]

I prefer the outlined button in the table instead of a primary

[niknetniko]

• As mentioned IRL, the button to save a comment doesn't seem to be translated sometimes.

(and we'll ignore the 403 as the beta will go away soon)