Project properties display issues

[Thomas-Fleming]

I'm experiencing a few display issues with the project properties.

Where: Build -> Platform target:
Issue: Combo-box isn't wide enough to read "x86_64-pc-windows-gnu"

Where: Build -> Optimization level:
Issue: Combo-box isn't wide enough to read any of the options.

Where: Debug
Issue: The whole screen is messed up. The text boxes extend beyond the right of my screen and there is no horizontal scroll bar. The vertical spacing between options is far too large. I can't input anything for "Start action:".

It's worth noting that my laptop has a QHD screen which might be affecting the layout.

[Boddlnagg]

This dialog has been removed with the switch made in #234, so this issue is no longer relevant.