fixes 11373 - adds related target to dropdown events

BS3 commits: 76f0d0ff32b6946dbd8c667a517a4deb69ad8890
Merge two fs variable declarations into one

BS3 commits: 3d3e2f2553e7ecdece141df99278404660e42e0e
add note about ios dropdown compat

BS3 commits: d18ba5083785052f37bc9e929fb315b144e88987
Fixed typo

BS3 commits: a1b545807327134401eaed28d6f6259eb0d5a7eb
fixes 11373 - adds related target to dropdown events. add note about ios dropdown compat

BS3 commits: 76f0d0ff32b6946dbd8c667a517a4deb69ad8890,
d18ba5083785052f37bc9e929fb315b144e88987
fixes 11288 - Vertical scroll position of modal saves between openings. fixes 11373 - adds related target to dropdown events. fixes 11379 - Fix carousel this.sliding not getting reset if $next.hasClass('active’). add note about ios dropdown compat

BS3 commits: ce4a2e435268a2eeb5578cbb4ff70bfaaed0eef9,
76f0d0ff32b6946dbd8c667a517a4deb69ad8890,
8a62f211131e2a5be7b7413281845c2f66716be4,
d18ba5083785052f37bc9e929fb315b144e88987