Redeploy Divide by 0 bug fix

[egbicker]

Fixes a divide by zero error after deploying changes that remove all entries from the trust database.

Closes #829

[egbicker]

This eliminates the divide by zero error when following the steps to reproduce the issue.

@jw3 There is another potential issue I found where if you add entries to the ATDB then remove some of them before deploying the loading status bar will have a larger numerator than denominator, something like "3/2 files" but this goes away upon a successful deploy.

[jw3]

There is another potential issue I found where if you add entries to the ATDB then remove some of them before deploying the loading status bar will have a larger numerator than denominator, something like "3/2 files" but this goes away upon a successful deploy.

You can add an issue for that one, with reproducing steps. No need to fix here.