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Port activities from GTK 2 to GTK 3 using our GTK 3 Porting Guide.

Issues need not exist even if a repository does exist. Search for candidate repositories using query "from sugar.activity". As at 2019-11-23, there are 200 hits on this search.

Repositories may not exist. Activity bundles may be found on activities.sugarlabs.org with no corresponding GitHub repository.

Activities may have been made obsolete by another activity. Care must be taken to assess if an activity is suitable for porting.

For this task, port an activity to GTK 3.