[user interface]: Use .png as the XYZ Tile URL format hint for raster & raster-dem tiles
#524
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|---|---|
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| 2m 23s | |
| 1m 4s | |
| 4m 34s | |
| 4m 17s | |
| 5m 28s | |
| 1m 45s | |
| 20m 33s |