small fix to have toolbar fit with default size on all themes
small fix to have toolbar fit with default size on all themes

tonyolag/gummi-vim,jmarshallnz/gummi,jmarshallnz/gummi,jmarshallnz/gummi,tonyolag/gummi-vim,jmarshallnz/gummi,tonyolag/gummi-vim,tonyolag/gummi-vim