- Replace uses of deprecated Bourbon helpers with raw CSS
- Add autoprefixer into the build chain to prefix the now removed helpers
This process was achieved by running through each of the deprecation warnings and using the following bash function to replace it in all files:
```
function bourbon-deprecate() {
grep -rl "@include $1" ./frontend --exclude-dir=.git | xargs sed -i '' -E "s/@include $1[(](.*)[)]/$1: \1/g"
}
```
For some helpers, this did not result in valid CSS, so manual modifications were made.
Closes#1189#1274
* AppSettingsPage at /admin/settings
* Adds App Settings to site nav items
* SMTP not configured warning
* Creates AppConfigForm
* Avatar preview
* API client to update app config
* Creates OrgLogoIcon component
* Hide username/password when no auth type
* Creates new PackComposerPage at /packs/new
* Creates PackForm component
* Adds PackForm to PackComposerPage
* Creates QueriesListItem
* Creates QueriesList
* Creates QueriesListWrapper
* Get all queries when the Packs Composer Page loads
* Form HOC handles updates to formData prop
* Creates form to configure scheduled queries
* QueriesListWrapper renders ConfigurePackQueryForm
* search queries input filters queries list
* Empty state text
* create pack when user submits the new pack form
* Adds Edit pack page to /packs/:pack_id/edit
* API client - get scheduled queries for a pack
* API client - create scheduled query
* Redux config for scheduled queries
* Remove scheduled queries from packs
* Add labels to pack on create
* Add disabled state to the select targets dropdown
* Adds edit route and pushes to new route on edit click
* Adds cancel button to edit pack form
* Adds Checkbox that selects all scheduled queries in table
