HydraulicStructures: split correctly reach and Hydraulic Structures + display only enabled reach in tab

src/Model/HydraulicStructures/HydraulicStructures.py

@@ -427,6 +427,18 @@ class HydraulicStructure(SQLSubModel):
     def basic_structures(self):
         return self.lst.copy()
 
+    def cloned_for(self, input_reach, input_section,
+                   output_reach, output_section):
+        new = HydraulicStructure(name=self._name, status=self._status)
+        new._enabled = self._enabled
+        new._input_reach = input_reach
+        new._input_section = input_section
+        new._output_reach = output_reach
+        new._output_section = output_section
+        new._data = [structure.cloned() for structure in self.lst]
+        new.modified()
+        return new
+
     def basic_structure(self, index: int):
         if len(self._data) == 0:
             return None