remove broken symlink
Remove database steps in DEVELOPER-ADVANCED.md
Correct minor spelling mistakes

@sam highlighted I made a spelling mistake in a commit - thought I would throw a few more in.
Merge pull request #2893 from DeanMarkTaylor/patch-3

Correct minor spelling mistakes in tests
Merge pull request #2891 from techAPJ/patch-1

FIX: browser password manager was saving name instead of username
Merge pull request #2883 from davidsantoso/update-developer-install-guide

Remove database steps in DEVELOPER-ADVANCED.md
FEATURE: advanced search help
copy
FEATURE: added status:noreplies and status:archived to advanced search
FEATURE: in:likes and in:posted search filters
FEATURE: in:tracking and in:watching search filters
FEATURE: order:views order by views
copy
multiple lines of post-actions smushed on mobile
mobile emails, use 100% / auto img sizing
mobile "new/updated topics"  alert was too small
reorganize site settings a bit
don't use Markdown
improve search help copy
Move search help to a more intuative spot