Fix empty stack trace in assertion for platform typed expression
Fix for KT-6106:  Using platformStatic crashes intellisense (but not Compiler)

 #KT-6106 Fixed
Added feature to "Convert to expression body" intention: selection for easier explicit type removal
Added JetCallableDeclaration.getColon()
Fixed KT-6128 Code completion does not work inside function literal if it's dependant on declarations below

 #KT-6128 Fixed
Renamed ReferenceSearcherImpl to IdeaReferenceSearcher
Repackaging
Minor
Big refactoring in j2k converter to support java&kotlin code updating to reflect changes in declarations produced by conversion (work in progress but all tests pass)
J2K: checked that field name change is correctly handled for usages in other converted classes as well
J2K: fixed conversion of base class constructor arguments
J2K: fixed conversion of default parameter values and annotation arguments
J2K: refactored code to make createDefaultCodeConverter() private
Removed workaround for compiler bug which has been fixed
J2K: processing usages of get/set methods in the code being converted when converting them into property
J2K: conversion with usage processing across multiple converted files works in tests (but not in real life yet)
J2K: memory optimization
Converted JavaToKotlinAction and JavaToKotlinActionUtil into Kotlin and merged into one class
JavaToKotlinAction refactorings + minor fixes in the logic
JavaToKotlinAction converts all files at once with cross usage processing