Link Dialog / Popup Name / Add validation to check for bad window names

[toga98]

Add validation to check for bad window names.

For example, if you type in a name with spaces it will not work in MSIE.

To reproduce in MSIE:

* Create a Link to "http://google.com"
* In the link dialog.
** Go to the target tab and select <popup window> as a target
** Type in "one two" as the Popup Window Name without the quotes.
* Press OK in the Link dialog.
* Preview the content. 
* Click the google link in the preview.
* The link is expected to open in a new window / window as named. Instead the link opens in the current window.

[alfonsoml]

Instead of giving a warning I would rather do it automatically like in V2:

	var sWindowName = "'" + GetE('txtPopupName').value.replace(/\W/gi, "") + "'" ;

We know what the problem is, so we should handle it automatically without any extra job from the user.

[m.nguyen]

Thank alfonsoml's advice.

[garry.yao]

I would vote for Minh's original approach, the auto fixing looks strange.

[alfonsoml]

After talking with Garry he agreed that we can use the new approach.

[m.nguyen]

Fixed with [5237].