[feature request] changing and / or switching of the spinning loading animation

To allow us running Speed Cache on professional website, we must be able to switch off or at least change the spinning loading animation, wich is very huge, not really responsive and therefore rather "unstylish".

Of course we could do this every time in CSS by ourselves, but the efforts this takes every time, prevents us from working with Speed Cache in general.

So we think it would be a good idea to give us the choice in the backend options for choosing different animations, colors (!) and - of course - to switch it off completely.

Great, if you could consider this minor tweak for a next release.

thank you.