Add looping animation for scenes and/or scene elements

Allow configuration of a looping animation in the scene editor. This would prevent elements to be static, which would prevent Burn-In in OLED displays

Options like:

-Start position

-End position

-Speed

When the scene is created, the element start at it's start position, and it will work its way until it reaches it's end position, at which point it will start in reverse, until it reaches it's start position again, and it will keep looping

Another option would be to spin the element, in which case there would only be the option to control direction and speed. Like a semi-circle battery indicator that spins slowly.

Another sub-option of spin would to make a scene element having it's position moving around an archor point, but without the element itself spining. Meaning if it's a text element, the text would alway be legible, but it would be moving around in a circle, never stopping.