contextbar: fix navbar markup This makes the contextbar markup more consistent with the Bootstrap documentation at https://getbootstrap.com/docs/3.3/components/#navbar and with the markup of the main navbar. This fixes a minor UI issue on small devices where the navbar-collapse border would show up as a too wide and too low black line.

[pytest]
# only look for tests in kallithea/tests
python_files = kallithea/tests/**/test_*.py
addopts =
    # --verbose
    # show extra test summary info as specified by chars (f)ailed, (E)error, (s)skipped, (x)failed, (X)passed, (w)warnings.
    -rfEsxXw
    # Shorter scrollbacks; less stuff to scroll through
    --tb=short