user_sample_model.py: added to_list and from_list functions for Qsettings functionality

src/aare/gui/models/user_sample_model.py

@@ -61,6 +61,13 @@ class UserSampleSpreadsheet(QAbstractTableModel):
 
         self._sort()
 
+    def to_list(self) -> list[dict]:
+        return [sample.to_dict() for sample in self.samples]
+
+    def from_list(self, data: list[dict]):
+        self.beginResetModel()
+        self.samples = [SampleShortInfo.from_dict(d) for d in data]
+        self.endResetModel()
 
     def rowCount(self, parent=None):
         return len(self.__sorted_samples)