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Murray Cumming authored
* glom/utils_ui.[h|cc]: Add a treeview_delete_all_columns() method to explicitly delete the columns instead of just removing them and sometimes implicitly deleting them with Gtk::TreeView::remove_all_columns(). * glom/mode_data/db_adddel/db_adddel.[h|cc]: * glom/utility_widgets/adddel/adddel.cc: * glom/import_csv/dialog_import_csv.cc: Use it. This seems to fix a crash when switching between Data and Find mode, though that might just have been due to not resetting the pointer to the button column.
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