Typo
Merge https://github.com/synfig/synfig
Port Gtk::Table to Gtk::Grid
Port Gtk::Table to Gtk::Grid
Comment the code
Comment and format
Port to Gtk::Grid
Remove the code commented out
Improve code formatting
Port to Gtk::Grid
Expand preview content window
Port Gtk::HBox to Gtk::Box and expand it

so that zoom widget is "really" aligned to the right side of preview window.