[Bug] Collection modified error.

[EvilVir]

Describe the bug
If I click too fast through list of accounts and folders, I sometimes get "Collection has been modified" error. It looks like there's general problem with bringing list of mails to UI. This is not the only bug around that area I experience. I had already seen random application crashes when clicking around, HTTPClient busy errors etc. If you for example try to delete multiple e-mails one by one, it often doesn't do that and just deleted e-mail gets back to the list.

Expected behavior
No errors :)

Screenshots
Wasn't fast enough to catch it. Will try to upload later in this ticket.

Additional context
Version 1.7.3 from Windows Store.