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.
These four messages should all have "then" changed to "than".

Also, we really shouldn't be handling our own parameter replacement to i18n messages like we are here with `$min` and `$max`.