Clean up some more carnage from D6416

Summary: rPad17c99c1b0222292a47ca79561a356cb8b5a5d5 stopped the fatal and this provides the forward fix. I think this is what a forward fix is anyway.

Test Plan: viewed a revision (D63 is my boy) and no fatals

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D6448
Fix fatal when deleted user is subscribed to a task and we generate an email to them

Summary: Fixes T3528. We won't be able to load the user if they've been deleted, and will fatal a few lines later on `$user->getID()`.

Test Plan: I'm going with my gut on this one.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3528

Differential Revision: https://secure.phabricator.com/D6442
Fix two problems with actor order in Asana bridge

Summary: We attempt to choose the most reasonable actor when synchronizing to Asana, but Asana is seeing the sync choose a less-reasonable actor. I spotted two places where the order may get disrupted; make sure we retain order. This is somewhat tricky to repro locally (it depends on things like native account order) but I think this is the right fix. If not, I'll add more logging. Ref T2852.

Test Plan: Used `bin/feed republish` to sync Asana events.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2852

Differential Revision: https://secure.phabricator.com/D6443
Add PhabricatorSlowvoteQuery

Summary: Ref T603. Ref T2625. Start pushing Slowvote (the greatest app of all time) into the modern era.

Test Plan: Looked at vote detail. Used `V1` and `{V1}` embeds.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T603, T2625

Differential Revision: https://secure.phabricator.com/D6444
Use ApplicationSearch in Slowvote

Summary: Ref T2625. Ref T603. Make the vote list policy-aware, mobile-friendly, and use ApplicationSearch.

Test Plan: {F50022}

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T603, T2625

Differential Revision: https://secure.phabricator.com/D6445
Partially modernize UI for Slowvote

Summary: Move some UI stuff to modern kit.

Test Plan: {F50024}

Reviewers: chad, btrahan

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D6447