adds the readOnly property to qx.ui.form.AbstractSelectBox
fixes a bug in qx.data.controller.CheckedList where an error is thrown when deselecting an item
corrects an error message in qx.data.controller.CheckedList to refer to the correct class
By using read only on select boxes, the select box will appear as if it is enabled, however the list items will not be selectable and (in supported themes) will not change visually when hovered over.
readOnlyproperty toqx.ui.form.AbstractSelectBoxqx.data.controller.CheckedListwhere an error is thrown when deselecting an itemqx.data.controller.CheckedListto refer to the correct classBy using read only on select boxes, the select box will appear as if it is enabled, however the list items will not be selectable and (in supported themes) will not change visually when hovered over.