GF-60944: Return false when parentNode is Floating layer on getAbsoluteS...

...howing

Fixing http://jira2.lgsvl.com/browse/GF-60944

Reproduce:
- Tap on "Open Dialog" on attached Sample.

Problem:
- The getAbsoluteShowing returns false on popup which is resulting in
isSpottable returns false.
- Focus is not getting into Dialog.

Solution:
- Returns false when parent node is Floating layer on getAbsoluteShowing

DCO-1.1-Signed-Off-By: Kunmyon Choi <kunmyon.choi@lge.com>