Improve the processor permission response error message

[Jako]

What does it do?

• Add a lexicon entry for the processor permission message.
• Output the permission and the processor action in the message (Moving the permission class property to the modProcessor class was needed).
• Show the new error message in the MODx.combo.ComboBox loadexception

Why is it needed?

It is not easy to detect, which permission is needed for a combobox processor permission error.

Before:

After:

How to test

Add the following code to i.e. core/model/modx/processors/workspace/namespace/getlist.class.php and open the MODX system settings.

    public function checkPermissions() {
        return false;
    }

In a grid, the message is shown in the empty grid content.

Related issue(s)/PR(s)

#13243, #12568, #15344

[Ruslan-Aleev]

Also related with - #15344
Powerful PR! Will there be no problem with encoding in json here? As in the issue above.

[Jako]

Yes, the JSON will be decoded and the encoded unicode chars will be transformed to readable text.

[Mark-H]

I don't typically want to engage in nitpicking textual stuff, but would "Permission 'foo bar' is required for 'action'" be better English?

I think "permission denied 'foo' for 'bar'" may give users the impression they have permission 'foo' but that it's not a valid role of sorts.

[Ruslan-Aleev]

Thanks for the PR! Everything works visually.

[Jako]

@Mark-H You are right. Thanks!