JS backend: tests for translation for extension property
JS backend: fix translation for extension property
JS backend: fix KT-3692:  js translator: Ensure that we don't create backing fields for traits

#KT-3692 Fixed
Cleanup the README text
Compilation fixed
Increase stub version
Suppress warning to avoid spontaneous addition actions
Update to Idea 139.658
Rewrite to Kotlin: TypedHandlerTest. File rename
Rewrite to Kotlin: TypedHandlerTest
Pair parenthesis before end of string template

 #KT-6403 Fixed
Corrected usages of isNullableType/isMarkedNullable
A bit more clear code
Completion of object's in type position - they can be used there
Correct completion of nested/inner classes after dot

 #KT-1889 Fixed
More clear test data format
KT-5986 No code completion for second type argument of HashMap instantiation
KT-6406 Code completion in type argument position should not include functions and variables

 #KT-5986 Fixed
 #KT-6406 Fixed
Fixed occasional insertions of fq-names by completion and similar effects

 #KT-6182 Fixed
 #KT-6111 Fixed
Safer class name insertion - do not insert artificial prefix too often because it may affect code parsing below in the file
Optimization