gtk3x: gui_dialog_vgrid_add()
To reduce number of gtk_container_add() calls in gtk3x-client, introduce gui_dialog_vgrid_add() that uses gtk_grid_attach() and maintains counter for the row. Use that instead of gtk_container_add() when adding widgets to gui_dialog.
To reduce number of gtk_container_add() calls in gtk3x-client, introduce gui_dialog_vgrid_add() that uses gtk_grid_attach() and maintains counter for the row. Use that instead of gtk_container_add() when adding widgets to gui_dialog.