Truncate section description when it's too long

[danswiser]

Description

I've had a few cases where the description text of a section has overflowed and caused UI issues.

In my past experience, I've never had an issue truncating text by default and I can't imagine a case where truncating the description text here isn't preferred as the default.

Before	After

Testing

• [x] Tested with/without ->headerActions([]).
• [x] Tested with/without ->compact().
• [x] Tested with/without ->collapsed().

Documentation

• [x] No changes needed.