BUG: Mailserver settings: Advanced

In Mailserver settings --> Advanced, the checkbox for "Delete emails from each Email account's Trash folder older than" and "Delete emails from each Email account's Junk folder older than" there seems to be a glitch in the display as after unchecking just one of these options and clicking save the resulting display has both options checked once again.

Tested in Chrome Version 66.0.3359.181 (64 bit)