This is the conventional way of dealing with unused arguments in C++,
since it works on all compilers.
Regex find and replace: `UNUSED\((\w+)\)` -> `/*$1*/`
This patch adds the show_gizmo and show_gizmo_navigate properties to the Image and UV editors.
Image Editor:
{F13026317}
UV Editor:
{F13026319}
VIDEO:
{F13026324}
Reviewed By: #user_interface, campbellbarton
Differential Revision: https://developer.blender.org/D14755
