Add search and replace functionality to the pattern editor.

[pgregory]

Description

Suggested by LAze on Tracker Music Discord

a given example
lets say you want to add a delay to every single note cut because you think it cuts too early, but you dont want to copy paste delay effects over and over again through the patterns. you can search for every note cut in the pattern (or full song) and put a delay on all of them immediately
its super helpful for complex things