[backend] also log when processing 'built' events

Fix some RuboCop offenses for Performance/*

Make staging muted delete icon a popover

Fixes #10302

[backend] also check the time to decide that the dispatcher loop need…

We used to restart after 50 job assignments to account for freshly created
jobs. This leads to too many restarts, but increasing the limit is also bad
if assigning takes too long. So also take the time spent in job assigning
into account and only restart if at least one minute has passed.

[backend] try to use sha256 when the default signkey is used

We already changed the publisher to do this, but forgot about
the signer.

Change user plain delete confirmation to use standard dialog

[src/api] Update tzinfo: 1.2.7 → 1.2.8 (patch)

Fixes #10383

[src/api] Update rubocop-rspec: 2.0.0.pre → 2.0.0 (patch)

[src/api] Update rubocop: 1.1.0 → 1.2.0 (minor)

[backend] speed up removal of old projpacks_linked data

We now maintain a new projpacks_linked_blks hash that stores
the size of the same-project blocks in the corresponding
projpacks_linked entry. Using this we can for one skip the
blocks much faster if the project does not match and we
also can remove the block with one single splice call.

This speeds up the removal phase considerably. It no
longer dominates the time used in setup_projects.

... offenses in views.

[src/api] Update webmock: 3.9.3 → 3.9.4 (patch)

[src/api] Update rubocop-ast: 1.1.0 → 1.1.1 (patch)

Add confirmation dialog to group members delete

Speed up removal of projpacks_linked entries in get_projpacks_postprocess_projects

We had three nested loops which took way too long in some cases.
Change the algorithm to make do with two nested loops.

Also increase the threshold for doing a complete recalculation to
500 projects.

This makes the scheduler call the BSSched::ProjPacks::print_project_stats()
function.

Fix flickering spec for Person::TokenController#delete