sets a label for the right list at the bottom
webix.ui({
view:"dbllist",
value:"1,2",
labelBottomLeft:"All groups",
labelBottomRight:"Selected",
data:[
{id:"1", value:"Contacts"},
{id:"2", value:"Products"},
{id:"3", value:"Reports"},
{id:"4", value:"Customers"},
{id:"5", value:"Deals"}
]
});