Increase max_length for the material_name field

[hadrava]

The openprinttag-database currently contains 1655 materials with name longer than actual limit of 31 bytes.
We want to keep the limit somehow round-number to allow for static buffer allocation.

That is why I am suggesting 47 bytes (48 with null termination). This statistics looks much better with for the limit of 47 bytes: Just 193 materials and most of them could be easily shortened to fit if needed.

I have also considered 63 bytes, which leaves only 16 materials with too long name. But this might be already impractical when the field is send with additional bytes.

I am attaching full histogram of material_name lengths from the database:

Here are few examples of materials, which would not fit even when this gets approved (

• Panchroma™ Dual Matte PLA Chameleon (Teal-Yellow)
• PLA Temperature Color Change Black To Red To Yellow
• Pearlescent Translucent Neon Green PETG PRO v2 - UV Reactive
• ABS Color Change Green to Yellow (Heat Activated)
• Sculpt-High Temperature Resistant Resin Ultra White
• Filaflex 95 Foamy Footwearology edition Lavender
• Pink Grapefruit: High Temperature Virgin PET-G with Sparkles
• Magic Silk PLA Tarnished Copper (Gunmetal Gray / Copper)
• Rapid PLA Gradient Thistle Purple & Ethereal Blue

[hadrava]

I am changing the limit to 63. I was a bit too cautious and 64 byte buffer should be still fine.