Adding an option to Ajax File custom field to override allowed HS file extensons

-- HikaShop version -- : 3.3.0
-- Joomla version -- : 3.8.6

Hi,
I think this is very usefull, to have another option in custom field Ajax File, where i can set different extensions for files that are allowed to be uploaded through this field. If this option is empty, the field (ajax file) will use the default option of allowed files from HikaShop.

As example, in my case, i need this option to allow users to upload only mp3 files in my "Demo song" field.
I have create a plugin that can play mp3 only (for the moment) from a custom field using the id of that field.
If possible, I would be willing to pay a modest amount for a faster implementation.

Hi,
I do not want to stress you guys, but how long do you think it will take until you implement this option?
Today I saw that it was a new version available I was so excited... but I can see that the option is not available yet .
Have a nice day!

Hikashop 3.5.0 New Feature:

• We added a "allowed extensions" setting for Ajax File and Ajax Image custom fields so that different fields can have different restrictions on the extension of the files.