fix(Item): split nested sass standards

Author: joselrio

core/src/components/item/item.ionic.scss

@@ -76,19 +76,19 @@ slot[name="end"]::slotted(*) {
 
 :host(.ion-focused) .item-native {
   --border-radius: #{globals.$ion-border-radius-400};
+}
 
-  &::after {
-    @include globals.border-radius(inherit);
-    @include globals.position(0, 0, 0, 0);
+:host(.ion-focused) .item-native::after {
+  @include globals.border-radius(inherit);
+  @include globals.position(0, 0, 0, 0);
 
-    position: absolute;
+  position: absolute;
 
-    border-width: globals.$ion-border-size-050;
-    border-style: globals.$ion-border-style-solid;
-    border-color: globals.$ion-border-focus-default;
+  border-width: globals.$ion-border-size-050;
+  border-style: globals.$ion-border-style-solid;
+  border-color: globals.$ion-border-focus-default;
 
-    content: "";
-  }
+  content: "";
 }
 
 // Ionic Item Lines