Support for fontawesome, slider and dashicons controls in repeater

[FairWindCo]

Issue description:

Now if add fontawesome, slider or dashicons controls in repeater as field type control not work. Fieid is empty. In code no support for this controls in repeater.

Version used:

I tried the latest version on the wordpress.org site

Using theme_mods or options?

Standart thems

Code to reproduce the issue (config + field(s))

[ArekZw]

Look: #1601 #1108 #652 (<- here is list of supported fields in repeater) More fields in repeater will be added in future

[mapsteps]

note to myself: we might bring over the slider.