Add list command

src/util/util.ts

@@ -2,4 +2,11 @@ export default class Util {
     static isArrayEmpty(array: Array<any> | undefined): boolean {
         return array === undefined || array.length == 0;
     }
+
+    static stringPrettyify(str: string): string {
+        return str // insert a space before all caps
+            .replace(/([A-Z])/g, ' $1')
+            // uppercase the first character
+            .replace(/^./, function(str){ return str.toUpperCase(); })
+    }
 }