[FEATURE REQUEST] Add reset button

[CodeShakingSheep]

I know when clicking "Quit" in the menu the background resets to my last static image background but then when I open Hidamari again, the last used video background is loaded again. I would like to have a reset button which I can click when Hidamari is opened. Clicking the reset button should load my last static image background again (same effect as "Quit") while having Hidamari open. Also when closing Hidamari and reopening it, I still want to keep my last static image background until I select a new video background in Hidamari again.