Tweak some values to make the GUI better for lower-resolution screens

[josephcagle]

I wrote and tested this program on a Mac with a Retina display, which has wayyyyy more pixels than most screens. Consequently, the GUI window is too small on most screens, which hides some GUI elements in the middle.

Test the program with different window sizes, changing values in the code to make it work right / look good. Make a PR with the new and improved GUI element sizes.

[kushagra-shukla]

Hey @DarthFloopy
I was thinking of using screen size (in pixels) of the device, that is, set sizes of Panels and Components by taking screen size into account. I think it will help improve responsiveness on different devices. If you think it is a good approach then assign this issue to me.

[josephcagle]

That sounds good!