=== TC 1 ===
 1. Zoom in to 150%
 1. Check editor if it looks normally, and no skin element is missing.
 1. Check dropdown lists and dialog windows if everything is working and looking normally
 === TC 2 ===
 1. Zoom out to 50%
 1. Check editor if it looks normally, and no skin element is missing.
 1. Check dropdown lists and dialog windows if everything is working and looking normally
 === TC 3 ===
 1. reset zoom to 100%
 1. Check editor if it looks normally, and no skin element is missing.
 1. Check dropdown lists and dialog windows if everything is working and looking normally