GUI appearance VERY wonky on OSX

[sloumdrone]

The buttons have borders on OSX but not on linux, the entry widget has a blue focus on OS X but a color listed in the code on linux. The scroll bar customizations do not seem to have any effect on OSX. All buttons do not have transparency, or at least have white behind the transparency for some reason. Sizes seem wonky.

I suspect Windows will have similar issues/variances. I fully expect that the application will look somewhat different on each system, but a focus on balance should be kept such that each platform still looks good/professional/close to the desired look.

In general, the app is being developed for GNU/Linux users, but it would be nice for it to look right on other machines.