Needed for GSOC: Adding id in menu item edit array

[infograf768]

We do need the id of the menu item in the $this->fields = array( in a menu item edit.php) for the GSOC multilingual project.
It was missing anyway to display the id in the page.

After patch, the readonly field will display:

Can be merged on review.
@andrepereiradasilva @alikon @jreys
@wilsonge

[alikon]

tested ok
but unable to mark successfull test on issues.joomla.org

[infograf768]

I marked it for you

[jreys]

I have tested this item ✅ successfully on ab4c091

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[infograf768]

@wilsonge

Thank you for merging

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[jeckodevelopment]

I have tested this item ✅ successfully on ab4c091

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[wilsonge]

What is this needed for? Seems kind of counterintuitive to the UI?

[jreys]

@wilsonge , this is needed in order to save associations on the side-by-side, without jform_id, I can't save new associations since I don't know which ID was generated

[alikon]

I have tested this item ✅ successfully on ab4c091

test to test joomla/jissues#860

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[smz]

Just by code review (i.e. not tested...): are you sure that comma after the last array element is correct?

[mbabker]

Yes.

[smz]

Right, I found this: http://stackoverflow.com/questions/2829581/why-do-php-array-examples-leave-a-trailing-comma

In essence, valid syntax, although unusual, and good for convenience in case you wish to add one more element in the code at a later time.

[brianteeman]

Does this field need to be displayed in the UI. Doesnt seem any need for it to be displayed to me and just adds meaningless clutter

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[infograf768]

It does NOT need to be displayed but it is useful information that can be copied and does not clutter as it is at bottom of all fields.

[wilsonge]

OK Can we make this a hidden field on the page - with an ID on the hidden field available for JS access

[infograf768]

@wilsonge
Done. imho does not need to be tested again. Can be merged on review.

[brianteeman]

Thank you for making that update