xdebug api improvement
move: take into account usages which won't be changed textually but could affect possible conflicts (IDEA-113280)
drop old external annotations format
revert meaningless: use actual (maybe unsaved) psi text for find usages (EA-49575)
IDEA-112968 Show "Value is always" warning only for null/true/false
IDEA-112567 Don't show any completion variants after method reference and dot
2x faster implicit field nullability detection
calculate constructor initialization for all fields at once, and cache (needed for dfa and nullable-stuff inspections)
fail-fast DfaMemoryStateImpl.equals
Refactoring: use PsiImplUtil.isLeafElementOfType() instead of org.jetbrains.plugins.groovy.lang.psi.util.PsiUtil.isLeafElementOfType()
xdebugger: restored custom presentation for keywords and numbers, changed values are highlighted by coloring their names