Added edit form to saved replies

What does this MR do and why?

Added edit form to saved replies list items.

Screenshots or screen recordings

Screen_Recording_2023-03-01_at_14.16.48

How to set up and validate locally

• Enable saved_replies feature flag
• Visit /-/profile/saved_replies/
• Create a saved reply
• Edit that saved reply

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

#355845 (closed)