Apply a smaller grid cell size for specific situations

For specific situations, for instance for very narrow waterways that are slanted with the direction of the grid, an even smaller grid size is desired in order to get the expected result.

More info:

https://previewsupport.tygron.com/wiki/Advanced_options#Elevation_model_resolution

https://community.tygron.com/forum/discussion/comment/676#Comment_676