resize in pasteboard%

Attempts to resize a given snip. If the snip allows resizing, #t is returned, otherwise #f is returned. Using this method instead of calling the snip's resize method directly will make the resize undo-able.

• (send a-pasteboard resize snip w h) -> boolean
     snip : snip% object
     w : non-negative real number
     h : non-negative real number