webui: client details now can be displayed for client names containing dots

[frb121]

This PR fixes a routing issues with client names that contain dots.

We now use query parameters for the link generation instead of
a route segment.

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[pstorz]

Good work, However, I think it would make sense to change the PR name to better describe what problem was fixed (From a user point of view)

e.g. webui: client details now can be displayed for client names containing dots.

Also the PR Number i missing in CHANGELOG.md

[frb121]

Good work, However, I think it would make sense to change the PR name to better describe what problem was fixed (From a user point of view)

e.g. webui: client details now can be displayed for client names containing dots.

PR subject changed to better describe the fix from user POV.

[pstorz]

Good work!