* Update login page to use service query
* Update modal to use session instead of store
* Move image sizes cache off store
* Update settings to no longer use store
* Update link-meta fetch to use agent instead of rootstore
* Remove deprecated resolveName()
* Delete deprecated link-metas cache
* Delete deprecated posts cache
* Delete all remaining mobx models, including the root store
* Strip out unused mobx observer wrappers
* install and setup lingui
* setup dynamic locale activation and async loading
* first pass of automated replacement of text messages
* add some more documentaton
* fix nits
* add `es` and `hi`locales for testing purposes
* make accessibilityLabel localized
* compile and extract new messages
* fix merge conflicts
* fix eslint warning
* change instructions from sending email to opening PR
* fix comments
