Remove IE6-8 branch, refs #17311.
(sort-of backport of dijit commit af80d059f9070bff17e7cbf5c20daa80007d58f0)
fix CheckedMenuItem disabled styling, fixes #17371, refs #10735
(cherry picked from commit a2cea0d21b89d782e0fbe228b86902118f168057)
Fixes #17387.  Replace Date.setTime (buggy in Chrome) with previously buggy setHours.
(cherry picked from commit b92ffd1b86275049dfded1c4efc245df0ecbfd31)
Clean up notification handles returned from Observable queries. Added condition to test case. Fixes #17394.
(cherry picked from commit bda7e1d7a804b4fd640ef91ae3cbdf94afb49336)

Also removing some dojo.data support code.
Fixes #17388.  Don't call preventDefault for touch events.
(cherry picked from commit 0482b557c761cdd96a640123bfb86200f667797c)
fix test file errors from AMD conversion, refs #15942
(cherry picked from commit 959a31c8cc50bcafb31c5c27153272666d1aea95)