I think it would be cool if the right toolbar in toolbar mode changed to show buttons to add and/or modify widgets when widget mode is selected. I think it would make toolbar mode more convenient for making layouts as well as drawing. This is just my thoughts, I don't wanna be rude, I really like decker, and I really appreciate all the work you've put into this project :3

It's not quite what you're asking for, but the right sidebar has gained some additional usefulness lately!

As of the most recent versions (1.69 and 1.70), the right side toolbar can be used to quickly change the color of widgets (the .pattern attribute) in widget mode and the color of a highlighted span of text in rich text fields while editing them Interact mode.