feat(FEC-13662): apply new design for dismissing floating player

[lianbenjamin]

Description of the Changes

• enhancement
  • apply new design of dismissible area
  • add new functionality: when dismissing the floating player, scroll to the main player
  • since the new dismissible area (above the player) is adding 32px to the height of the entire floating container - calculating the total floating container height according to the height and dismissible configurations

Solves FEC-13662

CheckLists

• changes have been done against master branch, and PR does not conflict
• new unit / functional tests have been added (whenever applicable)
• test are passing in local environment
• Travis tests are passing (or test results are not worse than on master branch :))
• Docs have been updated