fixes #7487 - remove unused background-image containing UTF-8 character

UTF-8 was causing BOMs to appear in the precompiled CSS, which then prevented
these styles being applied, so bullet points appeared on the dashboard.

(cherry picked from commit 5355b6b62a107b691572367883314f0e287438cd)
fixes #8467 - trends range selector is now visible

(cherry picked from commit 50594a5d105f53b0321e86839b2d72b26bf4a24e)
fixes #8459 - remove sp_subnet_id from api/hosts

(cherry picked from commit 69dc398fa4354ceab28cc5fced543ac637d81905)
Fixes #8433 - Fix type transformation for all ENC-able NICs

(cherry picked from commit 177a281a5204fbb57cbe9ff21f7003c553b91057)
templates - sync from community-templates

(cherry picked from commit 7529625f1ced8143e8217d7adf37e2ba657f7b3a)
i18n - extracting new, updating rails, pulling from tx