Apostrophe富文本Widget类传递问题：多类添加后样式选择器失效

I ran into an odd issue when passing custom classes to the Apostrophe Rich Text Widget. Here's a breakdown of the problem and where I stand with it:

• Single class works fine: After updating the sanitizeHtml documentation, I can successfully pass a single custom class to the widget. The associated style selectors work as expected, no problems there.
• Multiple classes break styling: As soon as I try adding multiple classes (separated by spaces, like you'd normally do), the component's style selectors completely stop working. None of the classes I passed are being applied correctly.
• Unconfirmed hypothesis: My current guess is that when passing a parameter with spaces, the widget is only capturing the first segment of the class string. That would explain why multiple classes don't work, but I haven't verified this by checking the underlying code yet.

内容的提问来源于stack exchange，提问作者Connor Whitman