Hard coded application window size

[asodugf12]

A hard coded size for the application windows may have issues on machines with differently sized monitors and screen resolution. For me (1920 x 1080), a lot of the knobs and sliders have been hidden from view. Might come up with a pull request in a few days, no gurantees tho :)

[nickrehm]

Ahh yea that's annoying. I was working on a 1920x1080p monitor at 100% scale in display settings