Network: Add reservoir shortcut at network edit.

src/Model/Network/Graph.py

@@ -220,6 +220,12 @@ class Graph(object):
             True
         )
 
+    def is_internal_node(self, node):
+        return not (
+            self.is_upstream_node(node) or
+            self.is_downstream_node(node)
+        )
+
     def is_enable_node(self, node):
         return reduce(
             lambda acc, e: (

src/Model/Tools/PamhyrList.py

@@ -67,6 +67,9 @@ class PamhyrModelList(SQLSubModel):
     def __len__(self):
         return len(self.lst)
 
+    def index(self, el):
+        return self._lst.index(el)
+
     def get(self, row):
         return self._lst[row]