chore(tile-mangager): revert using pad function

Author: didimmova

src/components/tile-manager/themes/tile-manager.base.scss

@@ -11,7 +11,7 @@
 [part~='base'] {
     display: grid;
     position: relative;
-    padding: pad(rem(20px));
+    padding: rem(20px);
     width: 100%;
     height: 100%;
     grid-template-columns: repeat(var(--column-count, auto-fit), minmax(min(var(--min-col-width, 100%)), 1fr));