cellnav on.navigate called on scroll

#4835

Author: jcompagner

src/features/cellnav/js/cellnav.js

@@ -681,8 +681,10 @@
                 if (grid.cellNav.lastRowCol === null || rowColSelectIndex === -1) {
                   var newRowCol = new GridRowColumn(row, col);
 
-                  grid.api.cellNav.raise.navigate(newRowCol, grid.cellNav.lastRowCol);
-                  grid.cellNav.lastRowCol = newRowCol;
+                  if (grid.cellNav.lastRowCol === null || grid.cellNav.lastRowCol.row !== newRowCol.row || grid.cellNav.lastRowCol.col !== newRowCol.col){
+                    grid.api.cellNav.raise.navigate(newRowCol, grid.cellNav.lastRowCol);
+                    grid.cellNav.lastRowCol = newRowCol;  
+                  }
                   if (uiGridCtrl.grid.options.modifierKeysToMultiSelectCells && modifierDown) {
                     grid.cellNav.focusedCells.push(rowCol);
                   } else {