Broken styling of option helper text

[tdulcet]

The 8bc2b1c commit broke the styling of the option helper text for several of my extensions.

For example, before that commit:

and after that commit:

As you can see, it causes each group of adjacent elements in the helper text to be displayed in a separate column, instead of displaying the entire description in a single column as expected. For reference, here is my HTML code for this example.

The same change was made to the CommonCss library in TinyWebEx/CommonCss@f661621 and I could file a separate issue in that repository if needed, as I suspect it would similarly break the styling for some extensions.

Also see: #17 (comment)