GH221 - Add next sibling separator when adding a new element of the same
type
GH221 - Add category separators for new top level elements
GH221 - Processor adds children for categories if separators are present
GH221 - Expand/collapse logic for separators
GH221 - Merge remote-tracking branch
'origin/GH221-codesync-descriptors-operations3'

Conflicts:
	org.flowerplatform.codesync.code.javascript/flex_src/org/flowerplatform/codesync/code/javascript/CodeSyncCodeJavascriptPlugin.as
	org.flowerplatform.codesync.code.javascript/src/org/flowerplatform/codesync/code/javascript/CodeSyncCodeJavascriptPlugin.java
	org.flowerplatform.codesync/flex_src/org/flowerplatform/codesync/CodeSyncPlugin.as
	org.flowerplatform.codesync/src/org/flowerplatform/codesync/operation_extension/AddNewTopLevelElementExtension.java