[FEATURE] Extended predefined css margin classes
 - Added responsive css margin classes
 - Introduced tiny css margin sizes
 - Added 'no margin' classes
 - Added fullscreen mode for samples in Explored App
 - Introduced possibility to run qunit test for predefined screen sizes
(Chrome only) 
Change-Id: Id957e64ff64ebb7a2c41ae2a0e7c620d73a3ee15
Merge "[FEATURE] Extended predefined css margin classes  - Added responsive css margin classes  - Introduced tiny css margin sizes  - Added 'no margin' classes  - Added fullscreen mode for samples in Explored App  - Introduced possibility to run qunit test for predefined screen sizes (Chrome only)  Change-Id: Id957e64ff64ebb7a2c41ae2a0e7c620d73a3ee15"