[plugin request] Select All For Codes

I had previously requested a plugin for the old V4 highlightable code box, where the codes were shrunk into a small textarea box, but someone suggested this in the features section. I think if a plugin were to be created to allow a select all option in code boxes, that would work just as well for me instead of the complicated converting the old V4 code to V5. I know that many people would support this request - in fact here is the topic about it in the other section Select All Patrick Clinger said that he felt it could be an easy request. I would love this, as I have been asking since the 16th January for the other request as I have very bad arthritis and manually highlighting is very hard on my wrists.