Revert "While reindexing include deleted apps (bug 896782)"

Reverting until we can figure out the infinite loop bugs that this
causes.

This reverts commit 54c33d53519c27d78eb3344d524670b832e48109.
Add a property for latest_version to provide a fallback (bug 899034)

Sometimes, latest_version isn't populated for non-incomplete apps,
which breaks some reviewers tools pages.