Added Admin Alert When Meter Is Set as Non-displayable (Resolved Issue#743)

[danielshid]

Description

I added an admin alert that pops up when a meter is set as non-displayable, which lists the groups the meter is used in and prompts the user to either confirm or cancel.

Fixes #743

Type of change

• Note merging this changes the database configuration.
• This change requires a documentation update

Checklist

• I have followed the OED pull request ideas
• I have removed text in ( ) from the issue request
• You acknowledge that every person contributing to this work has signed the OED Contributing License Agreement and each author is listed in the Description section.

Limitations

N/A

[huss]

Thanks to @danielshid for another contribution. Review and testing found it works as specified. I did made one comment about how it functions that was not specified in the issue. I would appreciate you addressing it.

[huss]

Thanks to @danielshid for doing the requested update for a changed requirement. Review and testing found it works as desired. For the record, I modified the notice text to something I thought worked a little better (I just decided this). Congratulations on another accepted contribution.