[gui][displayComponents] Refactor save button

darfix/gui/displayComponentsWidget.py

@@ -98,9 +98,9 @@ class DisplayComponentsWidget(qt.QMainWindow):
         layout.addWidget(self._plot_rocking_curves, 2, 3, 2, 2)
         layout.addWidget(self._scatter_rocking_curves, 2, 3, 2, 2)
         layout.addWidget(self._toolbar, 2, 5, 2, 1)
-        self.saveB = qt.QPushButton("Save")
+        self.saveB = qt.QPushButton("Save components")
         self.saveB.pressed.connect(self._saveComp)
-        layout.addWidget(self.saveB, 4, 0)
+        layout.addWidget(self.saveB, 4, 4, 1, -1)
         widget.setLayout(layout)
         self.setCentralWidget(widget)