Proportional scaling lock added!

@EricDobroveanu can you take a look at this project http://easel.inventables.com/projects/5Z8JhDy0tvE4NGoLcDRrag

Each time I try and adjust the rectangle that is out of place, that is try and change the width or height, it acts weird. The lock shows unlocked. But if I change the height, the width changes, the X Position changes, but the height stays the same.

These are rect items that I created with an app.