Outdent with indentClasses doesn't work on list

[Garry Yao]

1. Config the editor as:

   config.indentClasses = ['Indent1', 'Indent2', 'Indent3'];
   

And the following content.css addings:

.Indent1{
	margin-left:20px;
}
.Indent2{
	margin-left:40px;
}

1. Make the following content and selection:

   <p>^item</p>
   

2. Indent twice then try to outdent;
   • Actual Result: It's impossible to outdent the paragraph at all.

[Garry Yao]

Fixed with [6070].

[Garry Yao]

Typo [6070] -> [6097].