Don't run `onFinish` on hot reload

[erickzanardo]

It seems that the onFinish method is been run again even after the hot reload happens. That makes the development of an app that uses this package very bad. Maybe we could just don't run it after hot reloads.

[luanpotter]

If you hot reload from start and the screen is shown again we should run it again right? Agreed if it's the keep state hot reload and the screen is not shown, it should not call again. cc @renancaraujo

[erickzanardo]

If you hot reload from start and the screen is shown again we should run it again right? Agreed if it's the keep state hot reload and the screen is not shown, it should not call again. cc @renancaraujo

If you restart, than nothing needs to be done since everything is loaded again, everything will go as expected.

The problem is when you hot reload (pressing r on the terminal).

When doing so, the on finished of the splash screen runs again, and it can a hassle for the development workflow