QuickOpen looks misaligned in monokai theme

[isidorn]

Due to how colors are blending together.
Notice the color of the input and the selection of quick open and how the black background blends into the viewlet, so the input looks misaligned.

[brandontruggles]

Hello, I'd like to help with this!

UPDATE:
I believe I've fixed the issue by changing the "widget.shadow" property in the monokai theme from "#1e1f1c" to "#000000".

Before the change:

After the change:

Shall I submit a pull request? Thank you!

[aeschli]

@brandonrninefive Yes, a PR would be great!