ReDBox and Mint Curation Managers should confirm version compatibility

[greg-pendlebury]

It would be a nice safety net to confirm the ReDBox and Mint are both on compatible versions during system startup. If they are not then users will most likely strugle to get objects curating correctly.

Simplest solution I can see is to have them send each other a message regarding version numbers and respond with a confirmation message. Until a confirmation message is received an alert is shown in the UI to admin users.

If you look in HouseKeeper::onMessage() for the TF2 platform you can see a reasonably basic method for pushing these notifications to users. Setting 'ua.block = true;' locks the front-end system as well.