Added missing .grab_release() calls to all places where we call .grab_set().
(cherry picked from commit 10ea9409ce)
Co-authored-by: Tal Einat <taleinat+github@gmail.com>
Part 2 of 3. Continues PR GH-7689, changeset ee5ef30.
Edit and add tests for 18 modules, help_about to replace and run.
(cherry picked from commit ea3dc8029a)
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
SectionName. These split class GetCfgSectionNameDialog from
configSectionNameDialog.py, temporarily renamed config_sec.py in 3.7.9a2.
More Query subclasses are planned.