BC: Fix status propagation to Data object.

src/Model/BoundaryCondition/BoundaryCondition.py

@@ -503,10 +503,16 @@ class BoundaryCondition(SQLSubModel):
             new_0 = self._types[0](data[0].replace(",", "."))
             new_1 = self._types[1](data[1].replace(",", "."))
 
-        return Data(new_0, new_1)
+        return Data(
+            new_0, new_1,
+            status=self._status
+        )
 
     def add(self, index: int):
-        value = Data(self._default_0, self._default_1)
+        value = Data(
+            self._default_0, self._default_1,
+            status=self._status
+        )
         self._data.insert(index, value)
         self.modified()
         return value