Adds multi select in editor

[antpb]

This adds multi select so you can hold control/command and select many nodes. Clicking and holding on the last node will allow you to drag all selected items.

https://user-images.githubusercontent.com/8985705/209265387-d03e0869-b97e-4e07-9fb8-e40df540cba3.mov

[netlify[bot]]

❌ Deploy Preview for funny-salamander-6d0f7c failed.

Name	Link
🔨 Latest commit	bd4c785eed0cc79d4ca7759d416e701d7d8fee34
🔍 Latest deploy log	https://app.netlify.com/sites/funny-salamander-6d0f7c/deploys/63a520a36712580007881ec6