Galleria thumbnailsPosition top and left don't work

[rhegner]

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Current behavior
Galleria with thumbnailsPosition="top" shows thumbnails at the bottom and thumbnailsPosition="left" shows thumbnails on the right side. This behavior can also be seen in the examples in the documentation: https://www.primefaces.org/primeng/showcase/#/galleria/thumbnail

Expected behavior
Thumbnails are positioned according to thumbnailsPosition property.

• Angular version: 10.1.5

• PrimeNG version: 10.0.3