Tweak the invalid preset error message to mention `export_presets.cfg`
Tweak the invalid preset error message to mention `export_presets.cfg`

(cherry picked from commit a7b2f3d41aa47d64ad783d5afb35d08e706bf8ea)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot