Add "GPSTest" app icon

[Neluji]

Original icon having a cast shadow, I also did a version with one (using 15% black for shadow) :

Expand for SVG

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Since some icons with cast shadows don't have them in Delta, I used the one without but I don't know which one actually works best ?

[flameshikari]

It's better without shadows. And I think it's worth to resize the logo up to 73px, also color it with Dark pastel blue (#728DBE)

[Neluji]

Contrast is still ok with dark pastel blue ?

[Neluji]

73px in the larger (width) or smaller (height) dimension ?

[flameshikari]

Contrast is still ok with dark pastel blue ?

Yep, it's fine.

73px in the larger (width) or smaller (height) dimension ?

In this case, by width.

[Neluji]

Done ^^