repos: clean up table button markup to give proper spacing Before, it used multiple divs with pull-left to make plain buttons and buttons within forms render horizontally. But by doing so, they were rendered without any space between the buttons. Instead, style forms after buttons to be shown inline. The whitespace will thus give the necessary spacing. The redundant divs are thus removed.

# 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
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