Fixes #12418 - Correct dashboard behaviour for updated gridster

Updated version of gridster changed the widget class from gs_w to gs-w:
https://github.com/ducksboard/gridster.js/commit/c1668d9ab6261d3c5dc4215abdb73ca516492c19
This led to a bit of breakage in css and js which is fixed by this commit....

Fixes #4133 - compute resource test connection provides positive feedback

fixes #11309 - allow bulk hosts tool to open in new page

Fixes #7537 - Adds test connection button to LDAP form

Fixes #12371 - Initialize select2 on virtual machine tab for new hosts

Fixes #12231 - Allow editing smart variables with periods in puppetclass form

Fixes #10889 - Allow selection of resource pool

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 #12222 - prevent resizing textarea to under one line on FF

Fixes #12106 - Show popovers correctly on interface modal

When saving an interface the popovers were not destroyed, leading to
them breaking when opening the same interface form again.