Remove only initially selected rows in CSV export/import

The selection is changed after each removal and select new rows which result in
removing all the rows.
Indeed the TreeIter should be computed before modifying the store to ensure to
always remove the right rows.

issue6413
review37311002

tryton/gui/window/win_export.py

@@ -148,9 +148,10 @@ class WinExport(WinCSV):
 
     def sig_unsel(self, *args):
         store, paths = self.view2.get_selection().get_selected_rows()
-        while paths:
-            store.remove(store.get_iter(paths[0]))
-            store, paths = self.view2.get_selection().get_selected_rows()
+        # Convert first into TreeIter before removing from the store
+        iters = [store.get_iter(p) for p in paths]
+        for i in iters:
+            store.remove(i)
 
     def sig_unsel_all(self, *args):
         self.model2.clear()

tryton/gui/window/win_import.py

@@ -157,9 +157,10 @@ class WinImport(WinCSV):
 
     def sig_unsel(self, *args):
         store, paths = self.view2.get_selection().get_selected_rows()
-        while paths:
-            store.remove(store.get_iter(paths[0]))
-            store, paths = self.view2.get_selection().get_selected_rows()
+        # Convert first into TreeIter before removing from the store
+        iters = [store.get_iter(p) for p in paths]
+        for i in iters:
+            store.remove(i)
 
     def sig_unsel_all(self, *args):
         self.model2.clear()