Style Sessions block

[ryelle]

This is the sessions block, in list style. We can filter by track, but not by day yet - will create an issue for meta about that. Currently we can just list all the sessions on the /sessions page using the block.

[ryelle]

@melchoyce Sessions can list the date/time of the session in addition to the categories, so this could use an icon or some styling too - what do you think should happen here?

[melchoyce]

Can we mimic tag styles and use a calendar icon? https://material.io/resources/icons/?search=calendar&icon=calendar_today&style=outline