change modal box close button from div to anchor; add plugin for trapping keyboard input & use it on modal boxes
Add Tag Wrangling link to admin header
Fix long search tips causing horizontal scrolling
Update static pages for 500 and 502 error and placeholder and maintenance messages
Merge pull request #1174 from tuff-ghost/issue_3380c

3380c: improve keyboard input behaviour on modal boxes
Merge pull request #1175 from sarken/issue_2933_wrangling_and_tips

2933 Tag Wrangling link for admins, search tip scrolling, update static pages