* improved node adding list with dropdowns and scrolling
* changed arrow icon from default details arrow
* made 'add node' menu appear above mouse when clicking at bottom of nodegraph. Searching automatically opens the dropdowns you need. Set fixed 'add node' menu size
* updated code style to be more clear
* undo mistake changes
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Co-authored-by: 0HyperCube <78500760+0HyperCube@users.noreply.github.com>
