[Feature]: Add left side panel and allow point reordering/insertion on lines

**Platform:** Other

**Description:**
could it be possible to put it in a left side panel?
and to allow point reordering, or insertion between 2 points by clicking on the line.

**Discord:** https://discord.com/channels/1463383723327356992/1466576085960626186/1542372856699166780

Submitted by: sooluckyseven (Discord)