Correct completion of nested/inner classes after dot

#KT-1889 Fixed

idea/testData/completion/basic/common/NoNestedClassAfterReceiver.kt

@@ -1,6 +1,7 @@
 class C {
     class Nested
-    inner class Inner
+    inner class Inner1
+    inner class Inner2(s: String)
 }
 
 fun foo(c: C) {
@@ -8,4 +9,5 @@ fun foo(c: C) {
 }
 
 // ABSENT: Nested
-// ABSENT: Inner
+// EXIST: { lookupString: "Inner1", itemText: "Inner1", tailText: "()", typeText: "C.Inner1" }
+// EXIST: { lookupString: "Inner2", itemText: "Inner2", tailText: "(s: String)", typeText: "C.Inner2" }

idea/testData/completion/handlers/InnerClass.kt

@@ -0,0 +1,7 @@
+class C {
+    inner class Inner(s: String)
+}
+
+fun foo(c: C) {
+    c.<caret>
+}

idea/testData/completion/handlers/InnerClass.kt.after

@@ -0,0 +1,7 @@
+class C {
+    inner class Inner(s: String)
+}
+
+fun foo(c: C) {
+    c.Inner(<caret>)
+}

idea/testData/completion/smart/InnerClass.kt

@@ -0,0 +1,18 @@
+trait T
+
+class C {
+    inner class Inner1(s: String) : T
+    inner class Inner2 : T
+    inner class Inner3
+    class Nested: T
+}
+
+fun foo(c: C): T {
+    return c.<caret>
+}
+
+// EXIST: { lookupString: "Inner1", itemText: "Inner1", tailText: "(s: String)", typeText: "C.Inner1" }
+// EXIST: { lookupString: "Inner2", itemText: "Inner2", tailText: "()", typeText: "C.Inner2" }
+// ABSENT: Inner3
+// ABSENT: Nested
+// NUMBER: 2