Introduce more unique pivot value separators, to eliminate any possibilities of them being used in the data

[skrustev]

Is your feature request related to a problem? Please describe.

Currently the default columnDimensionSeparator for example is by default -. This creates some issues if left to be default and used for Date with syntax of type YYYY-MM-DD or anything similar that uses - in its field value. This spans for any other fields as well, not particularly for Date, but this case is more common.

Here's an example how column dimension headers are rendered in this case:

And how they should be. This was achieved with different separator:

Or another case when trying to filter, the most inner values only show the month:

Describe the solution you'd like

A way to eliminate that is to use more unique separators

Describe alternatives you've considered

Otherwise we force the users to configure different pivot keys based on their data they are using or not use certain symbols in their data.