Silica Gel Container 75mm & 79mm Variants

No major changes other than elongating the box from 50mm to 75mm and 79mm

This allows the container to make better use of the available space (thus fitting more desiccant) in the Modular Filament Box from Printable Accessories.

The 75mm will fit with wiggle room to spare, making insertion and removal easy. May rattle. Time will tell.

The 79mm will fit snugly or tightly (depending on printer calibration and use all available length (but not width) for desiccant.

Elongated the container from 50mm to 75mm and 79mm