fix new shortcut dialog when applying new settings (fix #44196) * settings-dialog.cc (write_changed_settings): new boolean parameter whether settings dialog is closing or not, calling function for writing the shortcuts with this parameter; (button_clicked): calling write_changed_settings with new flag set to false when button with accept role was clicked * settings-dialog.h: write_changed_settings with boolean parameter * shortcut-manager.cc (do_write_shortcuts): delete shortcut dialog only if settings dialog is closing, setting to 0 after deletion; (do_import_export): call do_write_shortcuts with new flag * shortcut-manager.h: do_/write_shortcuts with new boolean parameter

gnulib-hg = gnulib-hg