Is there any way to protect selected shape properties ?
I know that a shape can be completely locked, but what I have in mind is (for example) the ability to protect the aspect ratio - effectively 'forcing' shift-drag behaviour when ever a shape is re-sized.

I'd like to use this for my stencil shapes so that they can be re-sized without morphing.

I can see the Maintain aspect ratio check box in the properties inspector but that only seems to work when the fields are used to enter the size - it doesn't have any effect when re-sizing shapes with the mouse.