Remove comment
Replace checkbutton with togglebutton for layer creation
Improve labels and add some missed labels
Pack all layer type in a hbox

- Pack all layer creation buttons in a hbox,
- Pack  Name and its text field in an other hbox,
- Align Title label to left.
Align Checkbutton items

Checkbox at the right and its label at the left
Don't expand layer creation buttons.
Order options
Set border width of circle tool options panel, 3px.

Set 10px spacing to layer creation buttons row, let each row has same hight.