closes https://github.com/TryGhost/Ghost/issues/8270
- add `.jpeg` to the list of asset extensions that get fingerprinted
- remove the use of the `{{gh-path "asset" ...}}` helper - since switching to hash-location URLs all assets can now be referenced relatively and removing usage of the helper prevents it getting in the way of ember-cli's asset fingerprinting/rewriting mechanism
refs #7503
- Having assets served from the same directory as the admin makes this tricky to refactor server side
- It's also much harder to optimise for 404s
No issue
- fixed "{{#each}}" helper in templates to use block syntax
- fixed deprecated ember.controller getter/setter function to use new syntax
- removed unnecessary pass-protect route view
