[FIX] web_unsplash: add unsplash searched terms in attachement name/url

Before this commit:
An unsplash image would be saved as an attachement with:
  - A name like 'x54ze78z.JPEG'
  - An url like '/unsplash/x54ze78z.JPEG'
  - A filename like 'x54ze78z.JPGED'
We would not store the searched terms in the name/url.
Then, we would not be able to search on local attachement in the media dialog
to retrieve the images based on what we searched.

Now:
We store the searched terms in the name/url so it can be used later in the
media dialog search:
  - Name like 'big_lion.jpg' (duplicates may be possible)
  - Url like '/unsplash/x54ze78z/big_lion.jpg'
  - Filename like 'unsplash_x54ze78z_big_lion.jpg'

Task-1911345

0 files changed, 0 insertions, 0 deletions