Steps to reproduce:
1. Select two objects that are both adjustable in size, for example, two one-way arrow objects.
2. Notice how the width/height edit boxes disappear.
Expected: Edit boxes remain. (Disappearing if a non-resizable object is selected is understandable.) Entering a value affects all objects. An indication, such as displaying no number in the input box or recoloring the box, when the selected objects have different sizes would be nice, but not essential.