Support refactoring: Convert anonymous class to nested

Signed-off-by: Sheng Chen <sheche@microsoft.com>

Author: jdneo

src/refactorAction.ts

@@ -37,7 +37,8 @@ function registerApplyRefactorCommand(languageClient: LanguageClient, context: E
             || command === 'extractMethod'
             || command === 'extractField'
             || command === 'convertVariableToField'
-            || command === 'invertVariable') {
+            || command === 'invertVariable'
+            || command === 'convertAnonymousClassToNestedCommand') {
             const currentEditor = window.activeTextEditor;
             if (!currentEditor || !currentEditor.options) {
                 return;