Various screenshot issues

[TheRedDaemon]

There are some issues regarding the screenshot system of the game and in general:

1. The screenshots made with the in-game feature in vanilla 1.41 produce broken bmp files.
   No idea why.

2. The screenshots made with the in-game feature using the ApiReplacer in 1.41 produce broken bmp files that show only menu stuff.
   This has an interesting implication. It means that the buffer behavior is not accurately replicated.
   After all, the menu is sometimes shortly visible on a task switch. This shows lack in understanding of the render system.

3. The screenshots made with external tools while using a border window have wrong dimensions.
   They include the upper border, but the same space is missing on the bottom.

Neither of this issues cause noticeable problems so far. So therefore they are part of the backlog.
Should someone have an easy solutions, feel free to post it.

That being said, researching number 2 might be a great start if the intention is to better replicate the drawing and buffer behavior.