Fixes #12979 - Create helper for "new" button

Previously the button classes were applied to new buttons using jQuery.
This commit creates a `new_link` helper that makes sure all new buttons
will receive the correct class and only display if authorized. Also a...

Fixes #3582 - Parameters on subnets

Fixes #13584 - Rename 'DNS Proxy' > 'Reverse DNS Proxy'

Fixes #4629 - Migrate UI to Patternfly

Fixes #8800 - Clip table cells only when needed

For clipping to work, table must have class `table-fixed` and the cell
have class `ellipsis`. Also column widths should be set in table head.
Clipping will occur automagically with tooltip.

Fixes #11388 - Popovers display with correct size and dismiss on next click

Fixes #11014 - increased space for subnet domain assocation(up to 70 chars).

Fixes #7574 - Rails 4 :data attributes substitute deprecated HTML options

Fixes #9496 - Adds popover help to IPAM field in Subnet form

Fixes #8963 - Rename trunc helper to trunc_with_tooltip