Refactor JS code for map pages

* Create `mapPage.js` to contain reusable code from tree map page
* Rename `map.js` as `treeMap.js`
Merge pull request #1554 from steventlamb/topic/dont_migrate_deleted_models

Topic/dont migrate deleted models
Merge pull request #1555 from RickMohr/refactor-map-pages

Refactor JS code for map pages
Fix audit timestamps for migrated otm1 records
Fix audit records that crash the summary page
Clean up formatting of migrator output

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