Revert "wpaint.js: actually actually fix that"

This reverts commit 81ee819e5ab7a5f11405c3283d9a7d414fc3ac61.
Revert "wpaint.js: actually fix that"

This reverts commit b564269692da4aaf8e4bb637db9883c679945215.
Revert "wpaint.js: prevent submission on color change"

This reverts commit 3a97ff1a7e49354c40dacb26a94b1f574ecfbda7.