Show spinner on refresh button while manuscripts are still loading
The Refresh button on the manuscripts page should be disabled and show a spinner while the manuscripts are still loading. Once the new manuscripts (if any) have arrived, the button should revert to its original appearance.
This only needs to be shown to the user who clicked the Refresh button, and I think it's acceptable at this stage that if they refresh the page mid-way, we don't need to still show them the spinner. That allows us to get away without having to store state regarding our progress on the server.
Also, once the manuscripts have loaded, they should be displayed immediately. Currently a notice pops up saying that import is complete, but the new manuscripts don't appear until the page is refreshed. The user shouldn't have to refresh to see them. Again, I think it's reasonable at this stage that only the user who did the import gets their manuscript list immediately updated. Other users will still have to refresh to see new manuscripts appear.