Proposal: change "restart run" to "resume run"

[WBTMagnum]

When a playbook run is finished, it can be reopened with the "restart run" action (see PR #1448). I think the label is misleading. A restart would indicate a new start from the beginning, resetting existing progress.

Unfortunately, the confirm dialog does not clarify on this either:

Confirm restart run
Are you sure you want to restart the run?

Users might not proceed because of fear of data loss.

I therefore propose to rename the action to "resume", indicating to pick-up where the run was stopped.