Fix SQL export on catalog page

[antho-girard]

Questions	Answers
Branch?	develop
Description?	This PR re-adds link to SQL export that has been deleted
Type?	bug fix
Category?	BO
BC breaks?	no
Deprecations?	no
Fixed ticket?	http://forge.prestashop.com/browse/BOOM-1573
How to test?	In catalog page, click the SQL Export button

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[maximebiloe]

Thank you!