LT-127: Enable to scroll fluidly through images in FF and IE (WIP)

Packages/cornerstone/client/cornerstoneMath.js

@@ -1026,7 +1026,7 @@ var cornerstoneMath = (function (cornerstoneMath) {
         if (r1 !== 0 &&
             r2 !== 0 &&
             cornerstoneMath.sign(r1) === cornerstoneMath.sign(r2)) {
-            return
+            return;
         }
 
         /* Line segments intersect: compute intersection point.

Packages/viewerbase/client/components/viewer/imageControls/imageControls.js

@@ -1,5 +1,5 @@
 Template.imageControls.events({
-    'input #imageSlider': function(e) {
+    'change #imageSlider': function(e) {
         // Using the slider in an inactive viewport
         // should cause that viewport to become active
         var slider = $(e.currentTarget);

Packages/viewerbase/lib/setActiveViewport.js

@@ -19,5 +19,7 @@ setActiveViewport = function(element) {
     displayReferenceLines(element);
 
     // Set the div to focused, so keypress events are handled
-    $(element).focus();
+    //$(element).focus();
+    //.focus() event breaks in FF&IE
+    $(element).triggerHandler("focus");
 };