* AnAction is not Comparable, so it should be wrapped before processing

fixes WEB-32290 as a side-effect

IDEA-CR-31776

if there's only one suitable class with the required name in the project anyway

Those tests which really check importing of incorrect xml use special 'importProjectWithErrors' methods. This way we'll detect problems if some test actually doesn't work as expected because its pom.xml content is invalid (see IDEA-CR-31189 for example).

fixes occasional ClassCastException: com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl cannot be cast to com.intellij.psi.PsiImportStaticReferenceElement

Property values are needed but they are not stored in stubs.

IDEA-190203

* disable toolbar border for white themes

* title size and insets are changed

Registry property is enabled

To avoid "Packaging 'jar' is invalid. Aggregator projects require 'pom' as packaging" error on importing.

To avoid "Packaging 'jar' is invalid. Aggregator projects require 'pom' as packaging" error on importing.

API refactoring (following IDEA-CR-31740)