Fix the review request actions header on small mobile screens.
Review Request #14156 — Created Sept. 11, 2024 and submitted — Latest diff uploaded
On screens less than 350px, some actions in the review request header
get cut off. This change fixes that up, and updates a deprecated
rb-ns-pages.base.on-shell-mobile-mode
call.
Viewed the header on the File, Diff, and Reviews review request pages and
made sure they looked good (on <350px and >350px).