Import – Digikam: What is the extension for the exportet keyboard shortcut scheme?

Using digikam 5.6.0 I can export shortcut schemes.
(Menu: Settings → Configure shortcuts … → Manage schemes »→ More actions → Export scheme)

This results in a file without extension (contents in typical ini format)

However: How can I re-import again? The shortcut-File dialog box filter is filtered up something, but I just do not know what extension … without luck to guess …

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To update

At least, there is an alternative solution: past the complete and absolute path (ink file name) in the Location field at the top, press import. Jobs…