Squashed 'extensions/DFDiagram/' changes from 2b3a7f1..01179c4

01179c4 Revert "Attempt to fix ResourceLoader JS issues on 1.20"

git-subtree-dir: extensions/DFDiagram
git-subtree-split: 01179c49eb49e66c6daed4d9aaa8aa603ab328bb
Update DFDiagram

Merge commit 'c0b47688897f222126114094de6dbe257293b2d2'