[Refactor] 异步启动过程 以及 启动过程取消功能的实现

[natsurainko]

Wouldn't it be nice to do a launch like this?:

Under Launch button. Cancel Launch - this will also make it easier to cancel a launch.

So that the action window does not open on startup, because. It is not always convenient to manually return to the home screen all the time.

Success (On successful launch, button changes to Close Minecraft):

Crash (In this case, it's better to open action window immediately!):

I apologize for my poor English and lack of knowledge of Chinese!

Originally posted by @vanja-san in #145

[vanja-san]

I took another look and thought that only status bar would suffice, and button could be left untouched. 🙂

[natsurainko]

在 2.3.1.0 版本中已加入启动过程取消功能
UI 部分尚未修改