browser (slideshow): better handling of controls hiding: - use `slideshow_control` class instead of `click_to_hide` - check parents for the presence of this class (when a click on comments icon happen, it's the parent which has the `slideshow_control` class - stop propagation of events when closing comments tab, to avoid hiding controls accidentally

syntax: glob
*.pyc
*.pyv
*.swp
*.swo
*.js
tags
twistd.log
twistd.pid
sat.egg-info
*.un~
dist
MANIFEST
*.sh
build/
Session.vim
ctags_links/
html/