Do not suggest "add inner" quick fix for interfaces etc. #KT-18396 Fixed

idea/testData/quickfix/modifiers/nestedAbstractClass.kt

@@ -0,0 +1,6 @@
+// "Add 'inner' modifier" "true"
+class A() {
+    inner class B() {
+        abstract class <caret>C
+    }
+}

idea/testData/quickfix/modifiers/nestedAbstractClass.kt.after

@@ -0,0 +1,6 @@
+// "Add 'inner' modifier" "true"
+class A() {
+    inner class B() {
+        abstract inner class C
+    }
+}

idea/testData/quickfix/modifiers/nestedAnnotationClass.kt

@@ -0,0 +1,7 @@
+// "Add 'inner' modifier" "false"
+// ERROR: Annotation class is not allowed here
+class A() {
+    inner class B() {
+        annotation class <caret>C
+    }
+}

idea/testData/quickfix/modifiers/nestedDataClass.kt

@@ -0,0 +1,9 @@
+// "Add 'inner' modifier" "false"
+// ACTION: Create test
+// ERROR: Class is not allowed here
+// ERROR: Data class must have at least one primary constructor parameter
+class A() {
+    inner class B() {
+        data class <caret>C
+    }
+}

idea/testData/quickfix/modifiers/nestedEnumClass.kt

@@ -0,0 +1,9 @@
+// "Add 'inner' modifier" "false"
+// ACTION: Convert to sealed class
+// ACTION: Create test
+// ERROR: Enum class is not allowed here
+class A() {
+    inner class B() {
+        enum class <caret>C
+    }
+}

idea/testData/quickfix/modifiers/nestedInterface.kt

@@ -0,0 +1,8 @@
+// "Add 'inner' modifier" "false"
+// ACTION: Implement interface
+// ERROR: Interface is not allowed here
+class A() {
+    inner class B() {
+        interface <caret>C
+    }
+}

idea/testData/quickfix/modifiers/nestedObject.kt

@@ -0,0 +1,8 @@
+// "Add 'inner' modifier" "false"
+// ACTION: Create test
+// ERROR: Object is not allowed here
+class A() {
+    inner class B() {
+        object <caret>C
+    }
+}

idea/testData/quickfix/modifiers/nestedSealedClass.kt

@@ -0,0 +1,10 @@
+// "Add 'inner' modifier" "false"
+// ACTION: Convert to enum class
+// ACTION: Create test
+// ACTION: Implement sealed class
+// ERROR: Class is not allowed here
+class A() {
+    inner class B() {
+        sealed class <caret>C
+    }
+}