Adds scrolling in function related messages

[davorrunje]

Description

Adds scrolling to function related messages.

Type of change

• New feature (a non-breaking change that adds functionality)

Checklist

• I have conducted a self-review of my own code
• I have made the necessary changes to the documentation
• My changes do not generate any new warnings
• I have added tests to validate the effectiveness of my fix or the functionality of my new feature
• I have included code examples to illustrate the modifications

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
fastagency/ui/mesop/message.py	53.41% <100.00%> (-1.41%)	⬇️
fastagency/ui/mesop/styles.py	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes