make <action> tag referenceable
Implement part of xml configuration schema

1. Implemented schema
2. Removed completioncontributor and refprovider for nls in xml - now this logic in NlsDomConverter
3. added to-be-done files
Rewrite completioncontributor for component with DOM api
Find Usages on component id now works fine

Module dependencies should be configured correctly
#WT-19 fixed work 10h
Merge branch 'feature/wt19' into develop
gutter icon for classes that used in configs

#WT-17 fixed work 1h 30m