Supporting copywriters, more streamlined translation edit.

[tomitrescak]

1. Ability to show the key in the UI and sort by the key or translation
2. Ability to specify HTML translation as {{ mf ‘key’ }} which automatically names the text as “<$key”>
   • in many scenarios programmer does not care about immediate translations. It is also not clear whether that text has been translated or corrected by copyrighter, so it is better to keep showing only placeholders. placing {{ mf ‘key’ ‘key’ }} seems redundant.
3. Translations are now edited inline not in message boxes below.