Steps to reproduce were: * Open an Asset Browser * "Mark Asset" on some data-block * Change the Asset Browser into a different editor (not File Browser!) * "Clear Asset" on the data-block again, or mark another asset * Change back to the Asset Browser, it will show an outdated list Now the file-browser reloads local file data after spaces were changed. Note that the current notifier code doesn't limit the space-change notifiers to the affected spaces, so changing any visible space will trigger this. That's an issue to be fixed separately.