Improve tests (#854)

Recover commented out tests, 
Improve usage of helper in driver, 
Added data-wd-key for test to use instead of classes
Moved all non tsx file to a single folder (lib) instead of lib and utils

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Co-authored-by: Yuri Astrakhan <yuriastrakhan@gmail.com>

src/components/FieldId.tsx

@@ -20,6 +20,7 @@ export default class FieldId extends React.Component<FieldIdProps> {
       <InputString
         value={this.props.value}
         onInput={this.props.onChange}
+        data-wd-key={this.props.wdKey + ".input"}
       />
     </Block>
   }