Delay loading the Spam folder
Feature Summary
Geary should delay loading the contents of the Spam folder until the very end of the refresh/new acct loading.
While trying to isolate #1141 (closed) I noticed that when Geary loads or refreshes and account it will go through the Spam folder instead of prioritizing (arguably) the user non-standard folders/labels.
I believe it would be nice to push back any "Spam" or "Junk" named folder to the end of the queue, so that users can start seeing their useful messages and labels as soon as possible, while the large Spam folders can take their time to load.