* Make loader blocks mirrored on RTL

* Whoops, forgot to change names

* Fix problems with flipping back

don't set redux project title directly from sb uploader; only extract title from .sb2 and .sb3 filenames

* Look up video id based on locale.
* add japanese video ids
* add test

* Adjust language icon and caret in menu-bar
* remove unused style from `language-selector.css`

Also added jsdoc to locale-utils

stripped title handling from sb file uploader
updated more projectState related names
simplified hash-parser-hoc logic slightly

* Translate "(empty)" and "length {value.length}"
* Use FormattedMessage

load new project, both json and title; set title on file load; draft of code to fetch title from api