fix(grid-list): correct responsive styling (#226)

Author: patrickmichalina

projects/flosportsinc/ng-grid-list/common/grid/grid.component.scss

@@ -37,6 +37,8 @@
       justify-content: center;
       left: 0;
       right: 0;
+      top: 0;
+      position: absolute;
     }
 
     &.list-item-container {