closes#2883, closes#2951
- introduce custom findQuery in ApplicationAdapter
- posts/post route and editor/edit route now use custom findQuery to find a single post by id with query params
- create a sorting function in PostsController for out-of-order loading
- refresh updated posts in posts.index to make PostsList highlight latest draft after returning from a save in editor
No issue
The following is a list of routes which are not authenticated
- placeholder routes: `editor` and `content`
- `application`
- password routes: `forgotten`, `reset`, `signin`, `signup`
- Change fixture response of posts route to actual format.
- Extracted classNames logic of routes into style-body mixin.
- Additionally replaced all double-quotes with single-quotes for style conformance.
