Increase Vendor Comments Character Limit

Hi, 

I would love to see the character limit for the vendor comment section increased. 

256 characters is quite low. 

Each vendor I have has specific information that I need a way to easily keep track of. The comment section is a great spot for this information, but there is not enough space to fit it all. 

Please consider increasing this so that I can put a decent amount of information there. 1000 characters would suffice. 

Thanks