Update w2grid.js
Update w2grid.js

-removed unnecessary event handlers 
-DOM nodes looking more sanitized
mpf82/w2ui,vitmalina/w2ui,vitmalina/w2ui,vitmalina/w2ui,mpf82/w2ui,aadrian/w2ui,aadrian/w2ui,aadrian/w2ui,vitmalina/w2ui,mpf82/w2ui,aadrian/w2ui,mpf82/w2ui,aadrian/w2ui,vitmalina/w2ui,mpf82/w2ui,vitmalina/w2ui,mpf82/w2ui,mpf82/w2ui,aadrian/w2ui,vitmalina/w2ui,aadrian/w2ui