Add dropdown menus for changing animation and grid settings (i.e. animation speed and grid size) instead of conditionally showing more buttons for this directly in the menu bar. This frees up space in the menu bar, which is currently full on 5:4 resolutions.
The icons previously used for the default animation/grid buttons are now used for the main buttons that toggle animation/grid instead of using text.
Support setting lower animation speeds with the plus and minus buttons by adjusting the step size when the animation speed is low.
Support setting arbitrary animation speed by text input.
