css: additional fixes The fix in 56bce741176f was incorrect, as it robbed the login dialog of its panel styling. Using on .panel-primary instead of #main solves this. Additionally, while the rules deleted in a90acf3a1422 were indeed unused, it didn't actually solve the problem of select2 dropdowns being white on white, due to a separate selector also causing this effect. This should be fixed now.

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
.