DEVP-2919 Brings header behavior to the consistent state across pages.
Changes the link to the demo site.
DEVP-2837: delete unused steps, methods, files
DEVP-2919 Returns previous collapse button behavior.
Refactored model constructor factory. Added isBusy properties flags to item and collection
reverted changes
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reverted changes
DEVP-2919 Returns previous styles for collapse button
Merge pull request #612 from WarnerMusicGroup/DEVP-2837

DEVP-2837: delete unused steps, methods, files
Changes the link to the marketing site.
DEVP-2950: added test
Changes styles development version for cdn
tech wr edit
tech wr edit
tech wr
tech wr edit
tech wr edit
Merge pull request #616 from WarnerMusicGroup/DEVP-2919

Devp 2919