Completion: corrected presentation for extension properties

idea/testData/completion/basic/common/extensions/Extensions.kt

@@ -0,0 +1,18 @@
+package a.b
+
+class Some {
+    fun foo() {
+        "".<caret>
+    }
+
+    fun String.memberExtFun() { }
+    val String.memberExtProp: Int get() = 1
+}
+
+fun String.extFun() { }
+val String.extProp: Int get() = 1
+
+// EXIST: { lookupString: "extFun", itemText: "extFun", tailText: "() for String in a.b", typeText: "Unit" }
+// EXIST: { lookupString: "extProp", itemText: "extProp", tailText: " for String in a.b", typeText: "Int" }
+// EXIST: { lookupString: "memberExtFun", itemText: "memberExtFun", tailText: "() for String in a.b.Some", typeText: "Unit" }
+// EXIST: { lookupString: "memberExtProp", itemText: "memberExtProp", tailText: " for String in a.b.Some", typeText: "Int" }