Click on the taskbar icon reveals conflicting accounts

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## Feature request
34.0.2daily

**Is your feature request related to a problem? Please describe.**
In the case of a file conflict clicking the icon in taskbar shows a server, but not the one with the conflicting files

**Describe the solution you'd like**
When nextcloud desktop client notifies a conflict, or any other error with a server, clicking the icon should show the conflicting the acccount not a seemlingly random other synced server (is this currently just the first one?)

**Describe alternatives you've considered**
It is possible to right click the icon, select the one server that has a problem.

**Additional context**

The issue names no files or tests, so first trace how taskbar-icon clicks are handled and how conflict or server-error notifications identify an account. Done means clicking the icon for an error opens the account with that error, rather than another synced account.

Written by the indexing model from the issue text.