URL Decode custom-object tokens

[npracht]

Q	A
Bug fix? (use the a.b branch)	✅
New feature/enhancement? (use the a.x branch)	[ ]
Deprecations?	[ ]
BC breaks? (use the c.x branch)	[ ]
Automated tests included?	[ ]
Related user documentation PR URL	mautic/mautic-documentation#...
Related developer documentation PR URL	mautic/developer-documentation#...
Issue(s) addressed	Fixes #...

Description:

error on token in email based on a link field

Steps to test this PR:

1. Create url custom field on custom object
2. Create email
3. Add link from the custom field (on image src for instance) : {custom-object=your_object:image_link | order=latest | limit=1} (see Acquia's doc if needed).
4. Send to contact
5. The image is not generated (src is empty)

Apply PR, test again and all fixed 🚀 .