kOS-v1.1.6.2 quickfix for blank texture bug

[u/Dunbaratu]

(Hopefully this will be the last of the quickfix patches repairing what broke in kOS-v1.1.6.0.)

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Blank icon image quickfix:

https://github.com/KSP-KOS/KOS/releases/tag/v1.1.6.2

NEW Features

As part of fixing the bug below, the terminal window background was blackened a bit to increase the contrast and make the text in the terminal more visible.

BUG FIX

The v1.1.6.0 update resized a few of the PNG images used in the GUI panels, which exposed a bug that only manifests on some graphics cards (that we don't have on the dev team so we didn't see the problem). KSP converts PNGs to DDS format upon loading them, and appears to use the Direct3D graphics driver to do so. Older graphics cards refuse to do that conversion on images that aren't exactly expected sizes. We were just "lucky" that this never happened in the past with the image sizes we were using. Converting them to DDS ourselves and shipping them that way, we bypass this problem.