Issue title: Uncharged APCs can be activated for a tick
 Issue body: Apparently this is due to a missing check.

 Comments: 
 Comment 0: This is important, you can use computers for half a second on uncharged rooms, lets say that the power is off and you activate the APC, you'll have a small amount of time to check a computer info or press a button, open an airlock, etc. It's really awful.

 Comment 1: Additional Information: this precedes at least rev: 2000, almost certainly rev: 1400, and probably goes back beyond that.

{'source': 'GithubIssues', 'repo_name_with_owner': 'tgstation/tgstation', 'issue_id': 17934146, 'repo_stars': 1370.0}