java completion: improve constructor reference suggestions

show class qualified name (IDEA-182806)
add navigation to the class
as a result, sorting by proximity now works, and so lambdas have to be preferred explicitly

java/java-tests/testData/codeInsight/completion/smartType/NoQualifier.java

@@ -3,6 +3,6 @@ import java.util.ArrayList;
 class B {
   static void bar(String s){}
   {
-    new ArrayList<String>().forEach(<caret>);
+    new ArrayList<String>().forEach(b<caret>);
   }
 }

java/java-tests/testData/codeInsight/completion/smartType/SimpleMethodReference.java

@@ -3,7 +3,7 @@ import java.util.List;
 class MyTest {
 
   void m(List<Person> l) {
-    l.stream().map(<caret>)
+    l.stream().map(get<caret>)
   }
 
 }