Indicate hidden state in Navigator panel

Display a hidden state icon (to show what is set to Display: None), to explain user about hidden element in Navigator panel (DIv, section, row, columns etc...).

This will save some time and make everyone quick progress, instead of finding hidden element manualy. The current process is difficult to find the selected hidden element since the name of element will display in top left corner.

I have made a few sample picture to explain better way then text.