REPORT-823: Improved the preview pages for both cohort and person que…

…ry definitions.

* Cohort Queries
  * Previously, the preview page for cohort query definitions did not display enough information; only the
size of the cohort was shown.
  * Now, the preview page for cohort query definitions shows a pageable list of patient IDs in the cohort.
* Person Queries
  * Previously, the preview page for person query definitions displayed too much information; the table was
often too long and required scrolling to see all of the entries.
  * Now, the preview page for person query definitions shows a pageable list of patient IDs.
* The preview pages for both cohort and person query definitions now share the same style to create a consistent
look among the two.