fix(util): deltaMode being set to 0 (#5155)
fix(util): deltaMode being set to 0 (#5155)

WheelEvent.deltaMode is a READONLY property, as explained https://developer.mozilla.org/en-US/docs/Web/API/WheelEvent/deltaMode and by the error message my browser throws.  This should not be reset to zero.
bjossi86/ui-grid,YonatanKra/ui-grid,dbckr/ui-grid,JLLeitschuh/ui-grid,InteractiveIntelligence/ng-grid,louwie17/ui-grid,InteractiveIntelligence/ng-grid,YonatanKra/ui-grid,yccteam/ui-grid,bjossi86/ui-grid,Cosium/ui-grid,Servoy/ng-grid,kenwilcox/ui-grid,aw2basc/ui-grid,Cosium/ui-grid,angular-ui/ng-grid,aw2basc/ui-grid,angular-ui/ui-grid,angular-ui/ui-grid,kenwilcox/ui-grid,JLLeitschuh/ui-grid,mportuga/ui-grid,YonatanKra/ui-grid,AgDude/ng-grid,aw2basc/ui-grid,ntmuigrid/ntmuigrid,kamikasky/ui-grid,ntmuigrid/ntmuigrid,InteractiveIntelligence/ng-grid,louwie17/ui-grid,dbckr/ui-grid,mportuga/ui-grid,JLLeitschuh/ui-grid,ntmuigrid/ntmuigrid,dlgski/ui-grid,angular-ui/ng-grid,dlgski/ui-grid,angular-ui/ui-grid,mportuga/ui-grid,kamikasky/ui-grid,dlgski/ui-grid,angular-ui/ng-grid,bjossi86/ui-grid,AgDude/ng-grid,AgDude/ng-grid,yccteam/ui-grid,yccteam/ui-grid,kamikasky/ui-grid,kenwilcox/ui-grid,louwie17/ui-grid,Cosium/ui-grid,dbckr/ui-grid,Servoy/ng-grid,Servoy/ng-grid