Aerial Views screensaver

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* You can now add a gradient to the top and/or bottom of the screen to make text easier to see
* Added more options when using a photo or video filename as the description, removed 'formatted' option
* Initial "Loading..." message can be turned off
* New Italian translation by @marcopar
* Translations updated thanks to @peat80, TexetBoo, and José Manuel Lugones
* Playback speed notification bug fix by @dog77k
* Bug fix in Samba provider by @Andres78