Setup the toolbar.

def setup_toolbar(self):
        """Setup the toolbar."""
        self.savefig_btn = create_toolbutton(
            self, icon=ima.icon('filesave'),
            tip=_("Save Image As..."),
            triggered=self.emit_save_figure)
        self.delfig_btn = create_toolbutton(
            self, icon=ima.icon('editclear'),
            tip=_("Delete image"),
            triggered=self.emit_remove_figure)

        toolbar = QVBoxLayout()
        toolbar.setContentsMargins(0, 0, 0, 0)
        toolbar.setSpacing(1)
        toolbar.addWidget(self.savefig_btn)
        toolbar.addWidget(self.delfig_btn)
        toolbar.addStretch(2)

        return toolbar