Cross Version: versions and changes

Offline mode only.

Version: 0.7.1 Changelog: The MIT notice now ships inside the .hnmod (it is the header of the bundled engine source). The settings page's 'Delete the downloaded ViaProxy' deletes the jars only, so the account added to ViaProxy and its refresh token in saves.json stay. Also: a version switch on Edit Server and Direct Connect: choose what version ViaProxy tells that server it is (auto, 1.8, 1.9, 1.12.2, 1.16.5, 1.20.1, 1.21.1, 1.21.4, 26.3), kept per address, for servers whose status reports the wrong version.