Allow topic starters to change the conversation type

Allow the topic starters to change the conversation type while editing the initial post.

If during a discussion I find out that smth isn't possible yet, I want to change it from a discussion to a feature request (= move to the Ideas). I can just edit the text, even the title, but not the conversation type! Why?!

Should I start a new topic in this case? because I have no other (fast) ways to move it to the Ideas.

(you may suggest using the Report button for moderator's help, but it rarely works)