This way it's safer to launch time-consuming dependent tasks
(e.g. searching for code duplicates) synchonously since under
WriteAction they might cause deadlock.

They were caused by the fact that we first replace selected fragment
with method call and then use invalided elements of the same fragment
to find its duplicates.
I split ExtractMethodHelper#processDuplicates() into two methods:
collectDuplicates() that finds duplicates before the substitution is
performed and replaceDuplicatesWithPrompt() that handles user
notification and replacing found occurrences afterwards.
The same way this refactoring is implemented for Java sources
(see ExtractMethodHandler.invokeOnElements()).

Conflicts:
	platform/util/resources/misc/registry.properties

simplify and speed up JavaAllOverridingMethodsSearcher by reusing overriding methods search checks whether a class has methods with a given name

- Remove cyclicity from ComponentListFocusTraversalPolicy and rely on "focus cycle root" property of a container instead.
- Where a focus traversal cycle should not be closed, use "focus traversal policy provider".
- Focus cycle root is a focus policy provider by default.

extract superclass: hide implements base type from chooser for anonymous classes; fixed implements/extends list in the generated superclass

(EA-82661 - IAE: PsiImplUtil.setName)

Here is some timing figures for creating / disposing resources
Opened for:com.intellij.openapi.vfs.impl.ZipHandler$1@1832c1d, 640 for 5193
Closed for:com.intellij.openapi.vfs.impl.ZipHandler$1@1832c1d, 352 for 2993
Opened for:com.intellij.util.io.PersistentHashMapValueStorage$1@584821, 672 for 5290
Closed for:com.intellij.util.io.PersistentHashMapValueStorage$1@584821, 464 for 6347
Opened for:com.intellij.util.io.PersistentHashMapValueStorage$2@8713f9, 576 for 3803
Closed for:com.intellij.util.io.PersistentHashMapValueStorage$2@8713f9, 544 for 7451

The fix relates to a11y.

@author: Renaud Paquay <rpaquay@google.com>

* Set the "labelFor" property for all labels
* Re-order controls so that they are created in TAB order. This is
  useful for screen readers "overview" functionality.