fix(regions): Only show regions that are currently in the list but still store the settings for seen regions

Enables storing enabled status for regions that arn't in the current list.
You can untick 'Unknown' and it will remember the setting for the next time 'Unknown' comes up.
Merge pull request #64 from Eluinhost/fix/region-list

fix(regions): Only show regions that are currently in the list but still...