Avatar filesize in pixels

[rolfpancake]

In Backstage the max avatar size can be set for height, width and filesize.
The height and width in pixels but the filesize in byte, although there is a "pixels box".
It should be byte not pixels.

Also it should be considered, if 'Max size' is maybe a confusing term and if it would be better to call it 'Max filesize' instead.

//Edit:
On both ModernBB and Luna systems.

[Studio384]

Thanks for reporting. ;)