[core][ui] add upgradeAllNodes methods

+ check if node is upgradable in UpgradeNodeCommand

meshroom/ui/commands.py

@@ -270,6 +270,8 @@ class UpgradeNodeCommand(GraphCommand):
         self.setText("Upgrade Node {}".format(self.nodeName))
 
     def redoImpl(self):
+        if not self.graph.node(self.nodeName).canUpgrade:
+            return False
         inEdges, self.outEdges = self.graph.upgradeNode(self.nodeName)
         return True