fix(6017): Fixes ui-grid-viewport scroll issue in chrome v56 (#6125)

Chrome v56 introduced a new feature called "scroll anchoring" which causes the scroll position to

update if element content above the current scroll position has changed. Since ui-grid-viewport updates the margin of the first line whenever a user is scrolling, scroll

anchoring will cause it to get into a scroll loop and scroll indefinitely (i.e. scroll to the end of

the grid). Credit to @Joel-Kornbluh

Author: mportuga

src/less/body.less

@@ -18,6 +18,10 @@
   overflow-y: scroll;
   -webkit-overflow-scrolling: touch;
 
+  // overflow-anchor is a new feature/bug in chrome 56. See https://www.chromestatus.com/feature/5700102471548928
+  // It causes ui-grid-viewport to scroll indefinitely. See https://github.com/angular-ui/ui-grid/issues/6017
+  overflow-anchor: none;
+
   &:focus {
     outline: none !important;
   }
@@ -73,4 +77,4 @@
     right: 0;
     opacity: 0.66;
   }
-}
+}