• fix #1187 IE support for CustomEvent polyfill - thanks @phil-blais
• fix #1204 destroy drag&drop when removing node(s) instead of just disabling it.
• fix #1181 Locked widgets are still moveable by other widgets.
• fix #1217 If I set cellHeight to some vh, only first grid will take vh, rest will use px
• include SASS source files to npm package again #1193