Fix SmartStepInto tests on ubuntu
Test for Complete class names in expression position (KT-2821, KT-3779)

 #KT-2821 Fixed
 #KT-3779 Fixed
Use JB colors to avoid problems with different color schemes

- Fix KT-4725 Project wizard: bad font color
- Some warnings fixed

 #KT-4725 Fixed
Fix ArrayIndexOutOfBoundsException in named parameters completion
Added getOperationToken() method to JetUnaryExpression
Added helper methods to IfThenUtils
Added doubleBangToIfThenIntention
Added ifThenToDoubleBang intention
generated tests