Fix EZP-23480: Error in json response when uploading file

[joaoinacio]

JIRA: https://jira.ez.no/browse/EZP-23480

Under IE, ajax upload of files can lead to errors due to an incompatibility with eZAutoSave.
This "blacklists" the returned form fields for the ajax upload interface (window popup), which causes autosave ignore user input.

Tests: manual.

[yannickroger]

ping @dpobel

[andrerom]

This is rather a workaround isn't it?

[dpobel]

@andrerom you're right. The correct fix would be to avoid having the ajax upload form included in the content edit form so that autosave is not triggered when you fill the upload one (and in any case such imbrication is weird). But I'm unsure of the required amount of work to do that (maybe it's just a matter of moving the #relationlist-modal-window element somewhere else)

[joaoinacio]

My 2 cents:
AFAICT disabling autosubmit for changes in upload window is not a workaround, as it makes no sense to submit the form in this case.
I guess the method, however, can be considered as such.
@dpobel: Thanks for the hint, I'll investigate it further - with any luck it will be that simple.

Thanks for the feedback.

[yannickroger]

I agree with @joaoinacio why would we want to autosave those fields ? So I tend to be +1 on the current fix.

But if @dpobel 's suggestion leads to a simple fix, it's even better.

[joaoinacio]

Updated PR with different logic, basically using YUI to move the modal-window div to outside the form.

A slightly better but less readable approach would be to build it on the fly instead.

[andrerom]

+1

[dpobel]

+1