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/EnhancedSelectInputOption.css

@@ -27,6 +27,10 @@
   background-color: #aaa;
 }
 
+.isHidden {
+  display: none;
+}
+
 .isMobile {
   height: 50px;
   border-bottom: 1px solid $borderColor;