Seperate AddArtist, Artist. Refactor NavSearch, Artist Editor. Other

Misc UI Fixes

src/UI/AddArtist/Existing/UnmappedFolderCollection.js

@@ -0,0 +1,20 @@
+var Backbone = require('backbone');
+var UnmappedFolderModel = require('./UnmappedFolderModel');
+var _ = require('underscore');
+
+module.exports = Backbone.Collection.extend({
+    model : UnmappedFolderModel,
+
+    importItems : function(rootFolderModel) {
+
+        this.reset();
+        var rootFolder = rootFolderModel;
+
+        _.each(rootFolderModel.get('unmappedFolders'), function(folder) {
+            this.push(new UnmappedFolderModel({
+                rootFolder : rootFolder,
+                folder     : folder
+            }));
+        }, this);
+    }
+});