Only rebuild copy/move toolbars when switching accounts

When working on accounts with a *lot* of folders on slow servers, this
can be very slow. So let's try to only do it when it's actually needed;
when switching accounts.
4 jobs for faster-folder-switching in 16 minutes and 13 seconds (queued for 12 minutes and 17 seconds)
latest
Status Job ID Name Coverage
  Build
passed #102656
deb-package

00:03:32

passed #102654
fedora

00:03:10

passed #102657
flatpack-package

00:06:37

passed #102655
ubuntu

00:02:52