On any socket bindings screen, the installer seems to be using wrong range of allowed port numbers, with both 0 nad 65356 values allowed to be entered.

The correct range is 0 - 65535.
However, port 0 has special meaning and if used in server configuration, the server actually use random available free port, random on each start which seems anything by useful.

Thus I think we should limit allowed values to 1 - 65535.