fix iframe title for textarea widgets - for screen reader usability

[ptbrunet]

text area widget usability issues for screen readers:

1) Currently the accessible name for a text area widget is "edit box". This is what Window-Eyes uses for a role name so it is confusing. JAWS uses "edit". Change it to "edit area". The acc name comes from the document title attribute in the HEAD of the iframe.

For some background on item 1) read the comment at 07/06/07 06:32:03 in #3482

2) Due to the design mode technique used for FF2, it takes two tabs to get out of a text area widget. The first tab goes to the iframe, the second tab goes where it should. When focus moves to the iframe the accessible name should be changed from "edit area" to "edit area frame". This will help cut down on confusion.

Notes:

1) There is a timing problem, probably in FF2, such that the acc name is often not updated by the time the focus is fired. I tried firing the focus after a long delay but that did not help.

2) It will probably take two tabs to get out of a text area widget until the iframe/designMode technique can be replaced with a contentEditable technique, hopefully in FF3.

I'll open tickets for those two issues.

[Becky Gibson]

(In [9857]) fixes #3854 - in onKeyPress set focus to iframe element on tab key fixes #3880 - update title to iframe depending upon focus to help screen reader users deal with extra tab to get out of textarea in FF. added additional string to textarea that will require translation