fixed bug with mousewheel handling on chagne image page
fixed bug with mousewheel handling on chagne image page

swederik/cornerstone,google/cornerstone,adreyfus/cornerstone,jmhmd/cornerstone,chafey/cornerstone,cornerstonejs/cornerstone,liyocee/cornerstone,cornerstonejs/cornerstone,swederik/cornerstone,chafey/cornerstone,google/cornerstone,FilippiSilva/cornerstone,adreyfus/cornerstone,antoinepairet/cornerstone,adreyfus/cornerstone,liyocee/cornerstone,FilippiSilva/cornerstone,cornerstonejs/cornerstone,antoinepairet/cornerstone,jmhmd/cornerstone,cornerstonejs/cornerstone