Editor: extra tab stop on editor widget created from textarea in IE

[becky]

On the editor example created from a textarea there is an extra tab stop on the document container when used in IE.

Tab to the toolbar for the editor created from a textarea in IE7

press tab - focus goes to the document container.

press arrow to move the cursor -nothing happens. You must press tab again to be able to cursor within the document and add/edit information.

This extra tab stop is also evident when you want to shift-tab back to the toolbar to make style changes to the selected text - you must press shift-tab twice to reach the toolbar.

[becky]

this isn't critical and can wait for 1.1

[becky]

It also takes two mouse clicks to get an insert cursor in an editor created from a textarea

[doughays]

(In [12842]) Fixes #4996, #5835 !strict. IE wanted badly to focus the iframe's BODY tag on the way in and out. I added an onfocus handler for IE that just moved the focus either up or down another level to avoid stopping on the BODY tag. Also fixed a few code-style issues. becka11y verified correct behavior.