Don't show overflowing text in mobile schedule.
Don't show overflowing text in mobile schedule.

Hide any text that overflows cell boundaries in mobile schedule.  This
will prevent it from impacting readability of adjoining presentations.

This will only affect presentations with super long words (e.g.
"introduction", "performance") that are being displayed on mobile
devices with small screen widths (e.g. older phones like the iPhone 5S).

pydata/conf_site,pydata/conf_site,pydata/conf_site