style: remove vertical scrollbar on hover of last line's comment bubble When hovering the comment bubble of the last line of a diff, a vertical scrollbar appears. This behavior is not present on the stable branch. Attempts to fix the problem by changing element sizes or padding did not solve the problem. As an alternative, this commit hides overflow - this makes no visual difference.

[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