Traceability improvements

This is an issue which collects all current drawbacks of the traceability issues.

• User requests the matrix to be exported with hyperlinks to original items.

• https://playsql.atlassian.net/browse/RY-736 Exporting cross-space,

• https://playsql.atlassian.net/browse/RY-699#icft=RY-699 Collapse error,

• https://playsql.atlassian.net/browse/RY-679#icft=RY-679 New field

• https://requirementyogi.atlassian.net/browse/RY-640#icft=RY-640 Resize the columns

• https://playsql.atlassian.net/browse/RY-617#icft=RY-617 Joint queries

• https://requirementyogi.atlassian.net/browse/RY-552 JQL for the first row,

• Filters

• https://playsql.atlassian.net/browse/RY-471#icft=RY-471 Calculated fields

• https://playsql.atlassian.net/browse/RY-393#icft=RY-393 More options for the TestRef column

• https://playsql.atlassian.net/browse/RY-292#icft=RY-292 Diff on traceability matrixes