More color schemes + Resolution multiplier

What's new?

• Resolution multiplier implemented. The multiplier allows the program to create higher resolution images, by scaling the drawing of all geometric shapes.
• Modularized color schemes, so that new schemes can be added easily.
• Color schemes can now be categorized through the use of superschemes, which represent any number of subschemes. This categorization enables better sorting of the color schemes in the UI.
• Color wheel superscheme added, with 4 subschemes implemented.
• Color fall superscheme added, with 4 subschemes implemented.

What's changed?

• Optimized preview window, by preventing it from updating if the window is not focused.
• Refactored and cleaned up code, to prevent classes of biblical proportions.
• Changed how the mouse movement circle radius is calculated. A modified sigmoid function is now employed, since it works better than the previous approach.