Effects: Respect display value on inline elements

Take "olddisplay" value into the account

Fixes #14824
Closes gh-1566
Ref 73fe17299a840a8a7f3ffffcac15e32a88bd3d66
Data: Work around IE11 bug with onpageshow attribute

Fixes #14894
Build: Updating the master version to 2.1.2-pre.
Bower: Update project version to 2.1.2-pre
Core: Remove repeated test

Closes gh-1570
Core: Correct the number of expected tests
Merge pull request #2 from jquery/master

update