* Restructure feature popup header to handle string of different lengths

* Apply new feature popup header structure to call recording

* Apply new feature popup header structure to caller ID

* Apply new feature popup header structure to conferencing

* Apply new feature popup header structure to do not disturbe

* Apply new feature popup header structure to faxbox

* Apply new feature popup header structure to Find Me Follow Me

* Apply new feature popup header structure to Hotdesking

* Apply new feature popup header structure to Music On Hold

* Apply new feature popup header structure to Voicemail to Email

* Clean up remaining feature popup specific styling

* Apply new feature popup header structure to groups features

* Move sub-module templates in their own `views` folder

By using `getTemplate()` we can specify which sub-module a template is
related to, enabling this behavior.
The templates names were shortened by stripping the name of their
sub-module from it since they are stored under their sub-module folder.
String templates are created using `getTemplate()` instead of
`monster.template()` that we are trying to depreciate.

* Only use `getTemplate()` for both regular and string templates