TinyMCE: make sure vertical resizing and menubar show/hide are set to default...

TinyMCE: make sure vertical resizing and menubar show/hide are set to default for each instance, fixes #27724
Built from https://develop.svn.wordpress.org/trunk@28059


git-svn-id: https://core.svn.wordpress.org/trunk@27891 1a063a9b-81f0-0310-95a4-ce76da25c4cd