fix(datetime): improving detection logic

Author: ShaneK

core/src/components/datetime/datetime.tsx

@@ -1171,15 +1171,11 @@ export class Datetime implements ComponentInterface {
      * datetime is visible but the host clearly has layout, ensure
      * we still initialize listeners and mark the component as ready.
      *
-     * We schedule this a couple of frames after load so that any
-     * initial layout/animations (such as a parent modal presenting)
-     * have had a chance to run.
+     * We schedule this after everything has had a chance to run.
      */
-    raf(() => {
-      raf(() => {
-        this.ensureReadyIfVisible();
-      });
-    });
+    setTimeout(() => {
+      this.ensureReadyIfVisible();
+    }, 100);
 
     /**
      * We need to clean up listeners when the datetime is hidden