Comment 1 for bug 2026206

I've pushed a branch to working that addresses the "was NULL, now blank or all WS" granularity values by having the "get me events to work on" code understand that case in the one code path where we're looking for explicitly (and only) NULL granularity. See the top commit of:

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/miker/lp-2026206-empty-granularity