I have been dragging the Attribute item from the Shapes window, which is even more cumbersome than your method.
Your comment about right-clicking to choose "Insert 'Attribute' After" got me thinking.
You can use the little menu key on your keyboard to open the menu. Once the menu is open, hit n to choose the "Insert 'Attribute' After" command. It will insert a new item and select it, then you can just start typing. Press ESC when finished and you are ready to insert the next attribute.
- Select an Attribute
- Press Menu on your keyboard
- Press n to choose "Insert 'Attribute' After"
- Start typing while the new Attribute is selected
- Press ESC when finished, your attribute is selected again