HPCC-11587 Add 'Open In New Page' to Package Map area

The code for the Package Map display is upgraded to support
the function of 'Open In New Page'.

Signed-off-by: wangkx <kevin.wang@lexisnexis.com>
FYI (and is not needed in this instance) - The "then()" function, returns another promise and as such it is is good practice to return the response here (or a modified response), as this allows "chaining" of the promise/notification message - again not needed here as you are not doing anything with the returned value - but I have got into the habit of always including the return.