group_by date

[gdamjan]

the current backlog is just times:

22:46:57 Cthon98: hey, if you type in your pw, it will show as stars
23:12:02 Cthon98: ********* see!
09:30:14 AzureDiamond: hunter2
11:08:59 AzureDiamond: doesnt look like stars to me

It needs to show date headings when the day changes:

▶ 2020-05-05
22:46:57 Cthon98: hey, if you type in your pw, it will show as stars
23:12:02 Cthon98: ********* see!
▶ 2020-05-06
09:30:14 AzureDiamond: hunter2
11:08:59 AzureDiamond: doesnt look like stars to me