dialog: if first item is an input type=file focus does not go to the dialog when it is opened

[Becky Gibson]

Add an input type=file as the first focusable item in a dialog. When the dialog is opened focus is NOT within the dialog box.

[Becky Gibson]

seems to be a problem only in Firefox, IE 6 & 7 work ok

[Becky Gibson]

(In [12589]) refs #5934 added input type=file as first item of dialog for testing and debugging

[Becky Gibson]

check if FF and firstFocusItem is input type=file

[Becky Gibson]

(In [12706]) refs #5934 if in FF and first focusable item in a dialog is an input type=file make the dialog domNode the first focusable item. Will close ticket when I complete update of documentation for dialog in book

[Becky Gibson]

(In [12716]) refs #5934 I made the same change for tooltip dialog as for dialog- if input type=file is first focusable element and isMoz then set focus to the tooltip dialog container. Even tho tooltip dialog doesn't have the exact focus issues as dialog becuz setting programmatic focus to an input type=file in FF only sets focus to the browse button part - this fix is needed to user can get focus into the textbox part of input field when it is first element in tooltip dialog

[Becky Gibson]

documentation has been updated - closing

[bill]

(In [23488]) Make Dialog focus on close icon if the Dialog has no focusable elements. For TooltipDialog in this case, focus goes to the DOMNode, but officially TooltipDialogs must have at least one focusable element. Fixes #8285, #12131 !strict.

Also removed some FF workaround code about focusing an <input type=file>. It no longer seems to be needed (tested on FF3.6 on mac and windows). Refs #5934.

Finally, simplified Dialog aria tests.