[Hart] avoid the word "problems" on front page

From https://github.com/mysociety/FixMyStreet-Commercial/issues/487
[Hart] remove link hover from images

From https://github.com/mysociety/FixMyStreet-Commercial/issues/487
[Hart] fix inconsistent header height

From https://github.com/mysociety/FixMyStreet-Commercial/issues/487
[Hart] more spacing on .mappage .content

From https://github.com/mysociety/FixMyStreet-Commercial/issues/487
[Hart] correct links for FAQ

From https://github.com/mysociety/FixMyStreet-Commercial/issues/487
[Hart] refactor my.html

Supply cobrand-specific note in INCLUDE'd partial, instead of
overriding entire my.html
[Hart] footer links corrected
[Hart] css push report sidebar comments down

Fixes https://github.com/mysociety/FixMyStreet-Commercial/issues/488