Make outputResponseJson() and outputResponseHtml() protected

[PhilippGrashoff]

These methods were private before, making it unneccessarily hard for example to overwrite caughtException(). In my case, I want to return a jsToast if it was a JS request, not a full page load:

 //this code is in the if clause that checks if it was a JS request
$jsToast = new JsToast(['message' => $message, 'class' => 'error']);
           $this->outputResponseJson(
                [
                    'success' => true,
                    'message' => '',
                    'atkjs' => $jsToast->jsRender()
                ]
            );

[mvorisek]

these methods are intended to be private as they may be removed once output is reworked

in atk - these are too low level methods - you should break execution using some callback and return the data from it with specific mime