Property Editor while multiselect doesn't show which properties are not similar

In this screenshot, I have 2 text items: 1 visible, 1 invisible. I select both of them, property editor goes into "multiselect" mode, however properties controls are still showing values for the first selected item from the selected group. 
It would be useful to have a special state for controls, that visually communicates that the values in currently selected items are not similar.