style: fix changeset tag container - fix vertical alignment of right aligned tags Tags and comment count were not aligned with the line text at all, and a solid background were hiding the separator lines and made it look even more messy. extra-container and comments-container are now simplified with top right positioning and less margin tweaking. Minimal changes to the tags - just touching some external sizing so it fits in the container: line-height and margin.

# 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
.