[bugfix] Don't stretch on very wide status'es

[daenney]

Description

If someone makes a post with a long, uninterrupted piece of text in a code snippet, we would stretch the column to fit it, resulting in the UI going a bit whacky.

By setting min-width: 0% this fixes it, and we now automatically get a scrollbar on overflow instead.

Fixes: #1952

Checklist

Please put an x inside each checkbox to indicate that you've read and followed it: [ ] -> [x]

If this is a documentation change, only the first checkbox must be filled (you can delete the others if you want).

• I/we have read the GoToSocial contribution guidelines.
• I/we have discussed the proposed changes already, either in an issue on the repository, or in the Matrix chat.
• I/we have performed a self-review of added code.
• I/we have written code that is legible and maintainable by others.
• I/we have commented the added code, particularly in hard-to-understand areas.
• I/we have made any necessary changes to documentation.
• I/we have added tests that cover new code.
• I/we have run tests and they pass locally with the changes.
• I/we have run go fmt ./... and golangci-lint run.

[daenney]

Before:

After:

[tsmethurst]

Nice!