Replace smarty condition "else if" by "elseif"

[Klemart3D]

Questions	Answers
Description?	Replace smarty condition "else if" by "elseif" following official doc
Type?	refactor
BC breaks?	no
Deprecations?	no
Fixed ticket?	Partially #604 (must be also applied into Humminbird theme & modules)
Sponsor company	Your company or customer's name goes here (if applicable).
How to test?	Search for "{else if" in whole .tpl files, there must be "0 results"

[Klemart3D]

Pull request also made for Hummingbird theme : PrestaShop/hummingbird#605

[SharakPL]

Hi @Klemart3D and thanks for your PRs.
It's a really old doc you referenced there 😉 But in this part it's still valid in Smarty v.4 currently used in Prestashop so good job. Thank you 👍

[florine2623]

Hello @Klemart3D ,

LGTM ✅
classic theme on product page and contact page are well displayed.

Thanks!