**BUG**
Concise problem statement:
In Photo View,
1. a hole with a pad on the top side only shows as a hole with a pad round it on the top layer view;
2. a hole with a pad on the bottom side only shows as a hole with a pad round it on the bottom layer view;
3. a hole with a pad on one side only is invisible when viewed from the opposite side.
Steps to reproduce bug:
1. See: https://easyeda.com/forum/topic/Pads_with_holes_on_single_layer_do_not_show_holes_in_photo_mode-EJfVrJDVd
Results:
Holes with no pad around them are not shown in Photo View.
Expected results:
All holes in a PCB should be visible in Photo View.
(After all, they would be visible in a real photograph... :) )
Browser:
