When reviewing work, we're often clicking away from the comment box to draw and then back into the comment box to type.

It would be really cool to have a keyboard shortcut that brings up a floating window to add / edit a comment. This could pop away when we resume drawing. That way, we make "flow" more likely to achieve and make it more tablet friendly.

Furthermore, currently using the CTRL+Z hotkey will only remove the latest drawing and then remove text written from the comment box. We'd want it to only remove drawings.