Interactive maps messages review

This pull request was created only for message review purposes. Do not merge it!

Dear ComEng developers: pick red or green background to review the messages and their documentation, please :)

Once you finish review and we address all found issues we'll be able to delete the branch.
This sounds very robot-like (and is not quite grammatically correct).

Corrected:
"Interactive Maps error: one of the required parameters was not set"

Please apply to other messages as well. Assuming these are not visible to the user. If they are they'd need some more tweaking to sound more human and tell the user what to do (instead of what went wrong). Your PO will be able to help with this. ;)

Note: I don't consider this a blocker if you have other things to do.