Add heif to mimetypes we can handle.

If it can actually be handled will depend on config opts. But here we
just align with i.e. image/tiff which will also be listed if not
actually enabled.

Closes: #1555
Signed-off-by: Henning Schild <[email protected]>

Author: henning-schild

org.geeqie.Geeqie.desktop.in

@@ -11,5 +11,5 @@ StartupNotify=true
 StartupWMClass=geeqie
 NotShowIn=X-Geeqie;
 Categories=Graphics;Viewer;
-MimeType=application/x-navi-animation;image/bmp;image/x-bmp;image/x-MS-bmp;image/gif;image/x-icon;image/jpeg;image/png;image/x-portable-anymap;image/x-portable-bitmap;image/x-portable-graymap;image/x-portable-pixmap;image/x-tga;image/tiff;image/x-xbitmap;image/x-xpixmap;image/svg;image/svg+xml;image/x-png;image/xpm;image/x-ico;
+MimeType=application/x-navi-animation;image/bmp;image/x-bmp;image/x-MS-bmp;image/gif;image/x-icon;image/jpeg;image/png;image/x-portable-anymap;image/x-portable-bitmap;image/x-portable-graymap;image/x-portable-pixmap;image/x-tga;image/tiff;image/x-xbitmap;image/x-xpixmap;image/svg;image/svg+xml;image/x-png;image/xpm;image/x-ico;image/heic;
 Keywords=Picture;Slideshow;Graphics;