Drag image for text-area should contain text of text-area (#13557).

Change-Id: Ief653c3f15d18fdd076f0fb80f8a91ae429a54d3
Introduce a drag threshold for Drag and Drop (#13381)

Based on partial fix by Fabian Lange.

Change-Id: I1a18c6ea105d87496b196b93e701aaccb987b3e7
Fix FieldGroup and TransactionalPropertyWrapper memory leaks (#13438)

Change-Id: Ifafb6d87b4280f8bd9e631235fff62f42de4b4c8
Revert "Drag image for text-area should contain text of text-area (#13557)"

This reverts commit f227f0c1068f17e5491bd399d9f5bde16a0c8272.

Synchronising content after IE wraps the given element into a table with
a body causes a NullPointerException on client side. 

This patch also contains new API and should be targeted to master branch.

Change-Id: Ia19acd9fa31c7b67507bf797a2bab7c28ea37b4b
Always initialize WebBrowser for new sessions (#13571)

Change-Id: I3918498d63032f6b507b52634df5b41470363e15
Fixed resetting of ComboBox if focused and new items allowed (#13413).

Change-Id: Ibea81666101ff119e1b3e48726224f369e59b00f
Add test for TransactionalPropertyWrapper memory leaks

Change-Id: I69d0d759f95100f1dd9e2dbba57ec2c246e3aca9
ContainerEventProvider returns style names from container. Fixes #10718

ContainerEventProvider doesn't actually return 
style names from container in certain situations 
(copy-pasted code). This patch fixes the problem.

Change-Id: I512ea260f34a6db0572b614db393699da152fa8d
(cherry picked from commit 4709b75bb47d28630dacbb240bb43de16d972371)
Merge changes from origin/7.1

0d4080b ContainerEventProvider returns style names from container. Fixes #10718
6e91bdf Add test for TransactionalPropertyWrapper memory leaks
f0aaf89 Fixed resetting of ComboBox if focused and new items allowed (#13413).
e033fcd Always initialize WebBrowser for new sessions (#13571)
168de1f Revert "Drag image for text-area should contain text of text-area (#13557)"
35e2a34 Fix FieldGroup and TransactionalPropertyWrapper memory leaks (#13438)
7e5d44d Introduce a drag threshold for Drag and Drop (#13381)
f227f0c Drag image for text-area should contain text of text-area (#13557).

Change-Id: Idb01471f8ab0c7118fa884c364e6bc200d13948a