Allow ModernBB to check for update
Improve button style for some of our styles
Fix markup error when validation fails.
Add sublime, cache and config excemptions in 3.1 branch too.
Merge pull request #659 from oldhobbyist/fix-add-user

Fix markup error when validation fails.
Merge pull request #661 from oldhobbyist/add-gitignores

Add sublime, cache and config excemptions in 3.1 branch too.
Merge branch 'version3.1' into version3.2
Merge changes