Taskbar status not updated if no differences are found during sync
Steps to reproduce:
1. Synchronize a folder (local -> remote or remote -> local should not matter)
2. The taskbar shows a green animation while differences are being searched for.
3. If the result of the synchronization is that no differences are found, a dialog is shown to inform the user, but the taskbar animation keeps running until the next event that updates the taskbar animation (e.g. uploading a file)
1. Synchronize a folder (local -> remote or remote -> local should not matter)
2. The taskbar shows a green animation while differences are being searched for.
3. If the result of the synchronization is that no differences are found, a dialog is shown to inform the user, but the taskbar animation keeps running until the next event that updates the taskbar animation (e.g. uploading a file)