Alphabetically sort database and collection names

Closes #1

MongoView/View Controllers/DatabaseViewController.swift

@@ -47,9 +47,11 @@ class DatabaseViewController: NSViewController {
         super.viewDidLoad()
         
         mongoController.client.listDatabaseNames().flatMap { (databaseNames) -> EventLoopFuture<[DatabaseCollections]> in
-            let futures = databaseNames.map { (name) in
-                self.mongoController.client.db(name).listCollectionNames().map { (collectionNames) in
-                    DatabaseCollections(database: name, collections: collectionNames)
+            let futures = databaseNames.map { (name: String) -> EventLoopFuture<DatabaseCollections> in
+                let db = self.mongoController.client.db(name)
+                return db.listCollectionNames().map { (collectionNames: [String]) -> DatabaseCollections in
+                    let sortedNames = collectionNames.sorted()
+                    return DatabaseCollections(database: name, collections: sortedNames)
                 }
             }
             return EventLoopFuture.whenAllSucceed(futures, on: futures.first!.eventLoop)
@@ -58,7 +60,8 @@ class DatabaseViewController: NSViewController {
             
             switch res {
             case let .success(databaseCollections):
-                self.databaseCollections = databaseCollections
+                let sortedCollections = databaseCollections.sorted(by: { $0.database < $1.database })
+                self.databaseCollections = sortedCollections
                 DispatchQueue.main.async {
                     self.collectionsOutlineView.reloadData()
                 }