Can't omit default object name in imports and types

There should be only one way to denote a type (A.Default.B can't be denoted as A.B)

compiler/testData/diagnostics/tests/scopes/kt900-1.kt

@@ -1,7 +1,7 @@
 // import all members from class object
 package c
 
-import c.A.*
+import c.A.Default.B
 import c.<!CANNOT_IMPORT_ON_DEMAND_FROM_SINGLETON!>M<!>.*
 
 fun foo() {

compiler/testData/diagnostics/tests/scopes/kt900.kt

@@ -36,8 +36,8 @@ object N {
 package b
 
 import b.N.M
-import b.A.P
-import b.A.B
+import b.A.Default.P
+import b.A.Default.B
 
 fun foo() {
     val <!UNUSED_VARIABLE!>b<!> : B = B()