Number of Portoflio Options Appearing in Portfolio Field

[#1]

When converting an issue to a project, you are prompted to add that project to a portfolio. The portfolio drop down only shows your first 20 portfolios. 

This limit should be increased to show all portfolios available, or at the very least, have an arrow indicating there are more portfolio options that exist.

[#2]

It would be ideal to have an indicator showing there are more items in the list of portfolios other than what is showing. It requires a person to know what's in the list, which isn't always the case.