Fixes #2314 - fine grain for RAM selectors

Fixes #15924 - Implement server groups and scheduler hints

fixes #14202 - enable select2 in interfaces modal

Reverts commit 44723b9 and re-enables select2 in the interfaces modal,
instead fixing the issue with the NIC table detail lines to read the
network information out of select2 dropdown menus correctly.

fixes #14041 - don't call select2 on CR form templates

select2 must be called only when the select becomes visible, not for
hidden template elements. add_child_node() already does when adding a
new set of fields from the template. without_select2 is removed from...

Fixes #14204 - list only bridges for bridged networking

Fixes #13343 - Compute resource network modal is misaligned

Notice I also changed the help inline to be a popover, as per
Patternfly's recommendation -
https://www.patternfly.org/patterns/field-level-help/

Before: http://i.imgur.com/tVokboI.png
After fixing: http://i.imgur.com/AJusnmF.png

Fixes #4629 - Migrate UI to Patternfly

Fixes #12204 - Show interface form helptext in popovers

Refs #12204 - Resize interface modal, fields and labels

To cause virtual network settings to display correcty changes were also needed
in the layout of the compute attribute forms.

fixes #11172 - disable select2 with css class (and enable elsewhere)

Fixes #9480 - multiple NICs integration with compute profiles

From users point of view:
- interfaces setup in compute profiles is back
- interface related compute attrs get merged into host NICs upon compute
profile selection
- NIC overview table displays details in the column "Type"...