fixes #13066 - Improve readability of blank slate pages

Increase font size and reduce width of description of blank slate pages
to improve readability.

(cherry picked from commit 35ffdf5d6d961c7b9ec886e028fa23d6da629050)

fixes #14179 - don't merge NIC compute attrs in ComputeProfileMerge

When creating a host over the API and specifying interface compute
attributes, the interface attributes were overwritten from the compute
profile. Example request:

{"host":{"interfaces_attributes":{"0":{"primary":"true","compute_attributes":{"model":"e1000"}}}, ...}}...

fixes #14170 - permit 'zone' parameter for GCE CR creation

(cherry picked from commit 7c9391e615812c629acef99405af2cafde5f4cfe)

Fixes #14154 - fix adrift reports show page

(cherry picked from commit fc362ac8b5f9a9f8fb10ccaec1f68d5471b1bcf8)

i18n - extracting new, pulling from tx

templates - sync from community-templates

Fixes #14071 - Using Sprockets directive to require host_edit_interfaces.js

(cherry picked from commit d05be6d1b8b17e679fbea54b07b06425dc2622ed)

Fixes #13068 - Adds options to documentation_button and remove css float

(cherry picked from commit 32a855094347ef0a68d33c3c082fe3ca38036237)

fixes #13817 - test certificate.subject_alternative_names for presence

Otherwise certificate SAN test is always true even with no SAN. This
results in request_hosts being empty and thus ENC authentication fails.

With test by Dominic Cleal <dominic@cleal.org>...

Fixes #13711 - fix subnet/domain validation during creation

(cherry picked from commit 46eec8ba4163a8f237b3189f43d2f873a2267288)