Design Mode: Proper Sizing Phase 2 for Carve

Carve's Design mode should allow for a variety of means of sizing elements: px, pt, em, ex, in, mm, cm, unitless, percentage This should be accounted for wherever it is appropriate: width, height, x, y, radius, font-size, etc

Send Elements Forward/Backward in Stacking Order for Carve

All elements in Design Mode should have the ability to send an element forward/backward in the stacking order. This will be accomplished by a context sub-menu "Order": Send To Back, Send Backward, Send Forward, Send To Front. NOTE: This should only affect the stacking order within the selected item's parent. If th...