add scss property to set width of container

apps/app/src/components/ItemsTree/ItemsTree.module.scss

@@ -3,6 +3,7 @@ $grw-sidebar-content-header-height: 58px;
 $grw-sidebar-content-footer-height: 50px;
 $grw-pagetree-item-padding-left: 10px;
 $grw-pagetree-item-container-height: 40px;
+$grw-pagetree-item-container-width: 40px;
 
 .grw-pagetree {
 
@@ -65,6 +66,7 @@ $grw-pagetree-item-container-height: 40px;
 
     .grw-pagetree-item-container {
       .grw-triangle-container {
+        width: $grw-pagetree-item-container-width;
         min-width: 35px;
         height: $grw-pagetree-item-container-height;
       }

apps/app/src/components/TreeItem/SimpleItem.tsx

@@ -194,7 +194,7 @@ export const SimpleItem: FC<SimpleItemProps> = (props) => {
         onClick={itemClickHandler}
       >
 
-        <div className="grw-triangle-container d-flex justify-content-center col-2">
+        <div className="grw-triangle-container d-flex justify-content-center">
           {hasDescendants && (
             <button
               type="button"