The spreadsheet in .csv format is generated and saved in
            
Downloads directory.
Notes:
    		Save the applied advanced
            filter before export operation or an error is displayed.
The details of  a .csv
            file are as follows.
            - Header Section- The header section is displayed in the first
              (information type) and second (value) columns. The rows are in the following order.
                - Export Format Version
- Exported By
- Applied Product Configuration- The value is similar to the value displayed in
                  the identity card.
- Advanced filter title- if a saved advanced filter is applied.
- Number of Exported Levels
- Export Proposed Solutions
- Number of exported Items - The number of rows in contents section.
- Number of exported Logical instances in Structure - Number of rows with number
                  in Level Column (root is counted as one).
- Number of exported Proposed Solutions- The number of rows with SOL in Level
                  Column 
- Number of exported Specifications Documents: The number of rows with SPD in
                  Level Column.
 
- Content Section- The content section starts by column headers
              row and is continued by all data rows. The columns are in the following order.
                - Row order- As order of row is important to define a parent/ child relation, this
                  column prevents potential loss of information while sorting rows.
- Level- The levels shows the following information.
                    - A Number- If a row corresponds to a Logical instance Reference in the structure.
                        - 0 if it is the root (no instance in this case).
- n for an instance of level n in the structure. This row is the child of
                          the reference located on the first above row of level (n-1) in a .csv
                          file.
 
- SOL- If the row corresponds to a Proposed Solution This Proposed solution is
                      defined on  a reference located on the first above row with a level equal to a
                      figure.
- SPD- If the row corresponds to a Specification document. This specification
                      document is defined on a reference located on the first above row with a level
                      equal to a figure. 
 
 
- Title and all other exported attributes in the order defined
              in the Export panel.