Add check if assets/brushes folder not containts brushes, show message
warning and mypaint tools not working.
Move functions from helpers.js: makeElement, getDataJSON, showHide to
the utils.js
Small fixes set brush width in the painterNode, not set correct width
when swith between BrushSymmetry and MyPaintBrush
Correct selected folder brushes in the menu brush set, when changed direcories used arrows
Other small fixes.
Change __init__.py files copyes in the web_alekpet_nodes
Add name for brushes in menu select brush
Fixed pathes for js files and other resources
Rename utils.js to helpers.js