Rename Image Viewer -> Eye of GNOME

Michael Catanzaro requested to merge mcatanzaro/rename into master

Hi, Loupe has been approved to enter GNOME core, replacing eog:

Teams/Releng/AppOrganization#20 (comment 1789691)

As part of the core app replacement process, the original app should be modified to use a non-generic display name:

So let's go full circle and call it "Eye of GNOME" once again, instead of "Image Viewer." This frees the "Image Viewer" name for use by Loupe.

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