[CORE-961] Add ability to select view for client interface per company - Blesta

Details

Add a new section [Settings] > [Company] called [Look and Feel]. This section should have the following items:

[Themes]
[View Template]
[Custom Content] - CORE-828

[Settings] > [Company] > [General] > [Themes] should be moved to [Settings] > [Company] > [Look and Feel] > [Themes].

[View Template] should have an option to select the client view (auto-detect from reading file system in /app/views/client/*).

Each view should have a config.json file that contains:

{
"version": "1.0.0",
"name": "View template name",
"description": "Description of view template",
"authors": [

{ "name": "Phillips Data, Inc.", "url": "http://www.blesta.com" }

],
"require":

{ "blesta": ">=3.1.0" }

}

relates to

CORE-1162 Missing language definitions for new theme permissions