Allow resizable items to be automatic (css 100%) on one axis

[portmanteaufu]

I have a list of text boxes on a page I've created, and would like to be able to make them vertically expandable for user-input. I have attached a "south" handle for this purpose.

Unfortunately, the Resizable objects are a fixed height and width at all times. There doesn't seem to be any way I can specify that the resizable object should be 100% width while leaving the height as a resizable-yet-fixed number of pixels. Because of this, if the window is shrunk a lot of the text boxes interfere with other aspects of the layout.

Would it be possible to set an axis to 'auto' or a css percentage when creating a Resizable?

[Scott González]

Duplicate of #3634.