Create and update files in S3

Added methods to S3 media source to create and update files. Added create, quick create, udpate and quick update items to context menu.
Fixed passing source id into URL when clicking Edit file from context menu (undefined was passed before).
Removed commented lines
[#10093] Add create/update methods to S3 Media Sources

Merge remote-tracking branch 'TheBoxer/fix-10093' into bug-10093

* TheBoxer/fix-10093:
  Removed commented lines
  Create and update files in S3
Change string 'Failed' to _('failure') lexicon
Bump version to 2.2.9-dev

better late than never!
Remove executable bit on files
[#9976] Fix cross-context symlink caching

Remove context_key from forward_merge_excludes System Setting