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

#!/usr/bin/env python3


name = "app"
template = "app/app.html"