Improve UX of setting exact screen resolution

[Feodor0090]

Emulator version

1.7.4-play

Idea

Midlet settings already allows you to set a resolution, equals to physical.

But it would be nice to have 2 buttons to quickly set exact resolution (1280x1024 in my case) and a half of exact resolution (640x512 in my case). Now, if you device has non-common resolution and you don't remember it, you have to guess it (or just try different options several times).

[shinovon]