Gloomhaven - Trimmed and Basic Monster Stand

Remix of an existing stand. I was looking for an alternative to the stock Gloomhaven stands, as they're too rigid and tight, and strip the paper off the monster inserts.

Compared to the original file this is remixed off of:
- I removed the numbers as the monster prints themselves have them, and they make it harder to print.

- Also removed the inner reinforcing brace, as the flexibility allows for easier monster insertion, while still gripping well.