Set height:100% on #dijitEditorBody in addition to <body>.
Note that usually #dijitEditorBody is actually the <div> inside the <body>.

Setting height:100% on the <div> fixes the Chrome problem where typing ctrl-A
and then some characters locks up the editor.   Doesn't seem to affect IE or FF.
The scrollbar still seems to work (showing up when the editor content overflows).

Refs #16804, fixes #17559.
Fixes regression from b61b56813dc0c922976ca783496c374b81ca3b58.
(cherry picked from commit fbfc0fe89385b8c85f2ae75c27a15ac807b42e71)
avoid spurious failure on chrome where italic button is checked,
and stop using internal editor method to position caret, refs #9460
(cherry picked from commit f130c59e937bf9e71e4fe10f161972d9c1bb3dfd)