BoundaryCondition: restore back/forward and view buttons in the edit plot toolbar

src/View/BoundaryCondition/Edit/Window.py

@@ -185,7 +185,10 @@ class EditBoundaryConditionWindow(PamhyrWindow):
         self.canvas = MplCanvas(width=5, height=4, dpi=100)
         self.canvas.setObjectName("canvas")
         self.toolbar = PamhyrPlotToolbar(
-            self.canvas, self
+            self.canvas, self, items=[
+                "home", "move", "zoom", "save",
+                "iso", "back/forward"
+            ]
         )
         self.verticalLayout.addWidget(self.toolbar)
         self.verticalLayout.addWidget(self.canvas)