HPCC-11166 Separate Validate Package page to two, etc

Separate Validate Package Map page to two pages, one for validating
active package map and one for validating any package content.
Change the page layout for better display. When validating active
package map, the page will display the content of the active
package map. The content can be revised and validated. A save button
will be added in another pull request. In Validate Package Content
page, a user may drag/drop a package file or copy/revise any content
into the page.

Signed-off-by: Kevin Wang kevin.wang@lexisnexis.com