CMB-1656: Add a kind for dynamic change of style sheet 'moon.Theme'

### Issue:
- Container has 'dark' theme by default
- 'Light' theme app additionally load one more css file

### Fix:
- Instead of load additional file, replace existing file while app loading.

DCO-1.1-Signed-Off-By: Kunmyon Choi kunmyon.choi@lge.com