All too often I have both character screen and crafting screen open because I want to double check what I actually have on me - the problem with this is that the crafting screen has a higher priority so if the crafting screen overlaps my character screen, I can not move the character screen or, at times, check what my items actually do unless i drag the crafting screen away - which is also a hassle because as long as the character screen is open and underlapping the crafting screen, it doesnt let you drag either until you close the character screen by pressing the C shortcut
Wait, you can move your character screen? Mine is immobile. What's more, on mine the character screen is above / higher priority than the crafting screen. I guess I need to go post a Mac-specific bug report.
We intend to make all ui widgets movable. (The character panel is not movable for anyone at present.) The Crafting UI will get some love in an upgrade in a couple patches; much work to be done there.
I think what Shadowplay is describing is the way the Character panel is shown over the Crafting panel, but you can't interact with anything on the Character panel.
