Resolve "Export Inspector: allow selecting of root directory for pvserver configs"
requested to merge utkarsh.ayachit/paraview:19916-export-inspector-root-directory-selection into master
Separate root dir for data and image extracts
The export inspector now has separate root directories for data and image extracts. While this is generally not very useful, in client-server mode this is critical to support "Export Now". Since image extracts (including Cinema databases) are saved on the client side while data-extracts are saved on the server side, having separate roots make this usable.
Closes #19916 (closed), #19097 (closed)