Toolbox => Add str to bool function

Toolbox.ts

@@ -11,6 +11,11 @@ class Toolbox {
         return Toolbox._instance;
     }
 
+    public strToBool(str: string): boolean {
+        str = str.toLowerCase().trim();
+        return str === 'true' || str === '1';
+    }
+
     public randomString(length: number) {
         let result = '';
         let characters = 'abcdefghjklmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ0123456789';