Set up GitHub actions for Qt 6.

Fix some bugs.

Complete sort servers by clicking headers. Close #28.

Use previous binaries to build new Windows binaries (due to the Qt bug).

Fix issue #48.

Fix some bugs.

Merge branch 'master' of https://github.com/Dr-Incognito/V2Ray-Desktop

Enable using double click to connect to/disconnect from servers.

Remove unsupported options in headers of V2Ray HTTP protocol.

Fix some bugs.