Updated waiting times column on review queues (bug 793914)

For the pending and updated queues, we now use version.nomination.  And
version.nomination is set when app status goes to PENDING. For escalated
and re-review queues we use the queue's created stamp.
Quick fix for last commit
selected tabs on mobile reviewer tools (bug 839541)
move search outside of island on mobile reviewers (bug 839541)
queue tab switching overlay on mobile reviewers (bug 839541)
remove payments column on mobile reviewers (bug 839541)
condense device list column on mobile reviewers (bug 839541)
mobile paginator for mobile reviewers (bug 839541)
fix reviewer tab css regressions, remove menupicker (bug 847330)
hook gaia action menu for reviewers log navigation (bug 848123)
use gaia action menu on apps reviewing page and mod. review queue page