Patch #1476824 by Kevin Morse, Haza, droplet: micro clean up to tabledrag.js.
Patch #1574738 by nod_: rewrite tableheader.js.
Merge branch 'JStablehead' of github.com:Twinmat/backdrop into Twinmat-JStablehead
Issue #1574738 by quicksketch: Followup to tableheader modification to make work with Admin menu.
Merge branch '1.x' of github.com:backdrop/backdrop into 1.x
Issue #229825 by nod_, Rob Loach, sun, yched: Fixed ['has_js()'] must die.
Merge pull request #280 from Twinmat/JStabdrag

Patch #1476824 by Kevin Morse, Haza, droplet: micro clean up to tabledrag.js.
Issue #253: Fix failing admin menu tests.
Merge pull request #304 from quicksketch/fix-admin-menu

Issue #253: Fix failing admin menu tests.