Anycubic i3 MEGA tools holder (support for larger scraper and a larger tool)

A quick and dirty remix of derLowy's i3 Mega tool holder, since their design doesn't have a slot large enough to store the scraper that came with my i3 Mega. I didn't want to make the tool holder larger, so I simply opened up the scraper slot on one side so you can slide a larger scraper in. I also expanded the hole so it was large enough to store my wire brush.