Change UI icon option for toolbar. Add id property for toolbar  items

New toolbar option: jQueryUIicons, true/false, default false
If jQueryUIicons=true, the icon should be defined as jQueryUI icon )for
example
icon:"ui-icon-help", and the line-height property of the toolbar is
reduced from 34.to 26 pixels.

Also, the "id" attribute can be set for toolbar items.

Example:
toolbar:{jQueryUIicons: true,
items: [{
tooltip: "Help",
icon:"ui-icon-help",
id: "toolbarHelp",
click: function() {
...
}
}]
},