"Refresh" button not immediately usable

[georgwiese]

Context

When loading the dashboard, the "Refresh" button is spinning for a few seconds and cannot be clicked. It's not actually doing something, though, because any new dataset still doesn't show up in the dashboard when it stops spinning.

I have to wait until it stops spinning, and then click it to do the actual refresh.

Expected Behavior

I'd expect this button to be immediately clickable once the dashboard is loaded.

Current Behavior

See above

Steps to Reproduce the bug

1. Load the dashboard

Your Environment for bug

• Browser name and version: e.g. Chrome Version 95.0.4638.69 (Official Build) (arm64)
• Operating System and version: e.g. MacOS 12.0
• Version of WebKnossos (Release or Commit): 15971

[philippotto]

This is not really a bug but instead a symptom of (hackily) re-using the button for different things. 1) The button is used to initiate a re-scan of the binaryData folder on disk and 2) The button is used as a loading indicator when the front-end refreshes the datasets cache (by refetching the datasets without initiating a re-scan).

So, this is more of a UX problem. A quick solution might be to have a separate loading indicator for the "reload cache" part. However, we probably need to explain to the user what the difference between "rescan disk" and "reload from server" is..