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Gtk::HBox and Gtk::VBox were deprecated in Gtkmm 3.2. Replace with plain Gtk::Box. This commit makes the change for HBoxOperations.{h,cc}. Closes !25 - Modern Gtk3 - part 1
b0f455c7
Gtk::HBox and Gtk::VBox were deprecated in Gtkmm 3.2. Replace with plain Gtk::Box. This commit makes the change for HBoxOperations.{h,cc}. Closes !25 - Modern Gtk3 - part 1