Medium Support (Multi-disc Albums), Quality Grouping (#121)

* Multi Disc Stage 1 - Backend Work

* Quality Group Functionality

* Fixed: Only show wanted album types on ArtistDetail page

* Add Media Count Column to ArtistDetail Page

* Parser updates for multidisc cases, other usenet release title formats

* Search for Tracks by Medium Number in Addition to Title and TrackNumber

* Medium Renaming Token for Track Naming

* fixup Codacy and Comment Cleanup

* fixup remove comments

frontend/src/Components/Form/FormGroup.js

@@ -41,7 +41,7 @@ function FormGroup(props) {
 FormGroup.propTypes = {
   className: PropTypes.string.isRequired,
   children: PropTypes.node.isRequired,
-  size: PropTypes.string.isRequired,
+  size: PropTypes.oneOf(sizes.all).isRequired,
   advancedSettings: PropTypes.bool.isRequired,
   isAdvanced: PropTypes.bool.isRequired
 };