Cancel/Abort app restoration from UI

[DavidePrincipi]

The "Restore an application" operation of Backup page currently lacks a visible Cancel or Abort button.

• If many restore are started in parallel, node load may raise too much.

Proposed improvement

• Add a Cancel (or Abort) action during manual restore execution.

Acceptance conditions

For Restore an application:

• Termination of the restore will remove the restored instance completely (remove-module starts in response to SIGTERM)

See also

• https://mattermost.nethesis.it/nethesis/pl/p8uu8moi47rbxcmg58ersjcywc
• Add Cancel/Abort action to backup operations #7813

[stephdl]

QA target core:3.18.4-dev.2

verify the bug is not more reproducible, you can interrupt a restore task in the notification drawer

[DavidePrincipi]

VERIFIED

Restoring module is removed by SIGTERM handler