expand remaining non-explicit eslint-disable blocks and factor out globals when no-undef encountered

Added hiddenInterval and immediateExecution settings, fixed visibilitychange listening, implemented with mr widget

Updated tests

Added tests

Review changes

Fix broken tests

Fix undefined variable in es5

Update changelog with MR ID

Currently, the EventFilter whitelists event types for the "All" filter.
This has gotten outdated, which causes the confusing behaviour of the
"All" tab not really showing all events. To make matters worse, by
default no tab at all is selected, which does show all events, so
selecting the "All" tab actually hides some events.

Fix this by:
- Making sure All always includes all activity, by abolishing the
  whitelist and just returning all events instead.
- Make the All tab selected by default.
- Add Issue events tab to include the specific events around opening
  and closing issues, since there was no specific filter to see them
  yet.

Fixes #24826

When ldap is enabled and use "Standard" authentication method, if authentication fails
the correct tab remain selected.
This is done by saving into localStorage when the active tab changes and by always selecting that tab when
the page is loaded.

Adds tests for the Linked Tabs class

Removes event listener

Adds builds

Adds test

Adds changelog entry

Change airbnb eslint config package to `eslint-config-airbnb-base` and update plugins.

Change `airbnb` to `airbnb-base` for .eslintrc `extends` value.

Added changelog entry

Made sure all plugins and envs are set

Corrected new failing specs