Limit repeated action clicking

[aatkin]

implements #3204

rems.atoms/rate-limited-button wraps click handler and allows only 1 click every 2 seconds. perform-action-button wraps this and additionally subscribes to rems.spa/any-pending-request? to wait until any put/post requests are done. This should prevent repeated clicking which creates duplicate requests to API

rems.actions.* [accept-licenses add-licenses add-member approve-reject assign-external-id change-applicant change-resources close decide delete invite-decider-reviewer invite-member redact-attachments remove-member request-decision request-review return-action review revoke vote]
rems.administration.blacklist
rems.application.* [save-draft submit copy-as-new]

Checklist for author

Remove items that aren't applicable, check items that are done.

Reviewability

• Link to issue

Documentation

• Update changelog if necessary
• Components are added to guide page

Follow-up

• New tasks are created for pending or remaining tasks

[Macroz]

I think this is good enough to merge (and perhaps click around in dev).