[Request]: Reverse progress bar

[morris2009]

What would you like implemented?

It would be great if I could select the progress bar to go the other way around.
I have a led Matrix panel, and pixel 1 is apparently orientated top left, so the progress bar starts at the top left and works its way down to the right and then each time a line below from left to right.
Since the progress bar is not a selectable effect in WLED itself, can we have a 'inverse' checkbox to have it run from end to beginning.