Nyall Dawson 89f40b05f8 Move ::htmlMetadata from some data provider subclasses up to base class
Allows all layer types (including vector, mesh and point cloud)
providers to show custom metadata in the layer properties dialog.
Previously this was limited to raster/vector tile and tiled
scene layers only.

Also fix const for a lot of raster providers as a consequence.
2023-11-08 21:28:09 +10:00
..
2023-08-10 10:41:23 +02:00