refactor: standardize manager design

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

src/models/collection.ts

@@ -17,16 +17,7 @@ export class CollectionObject implements CollectionInterface {
             signature: null,
             created: null,
             modified: null,
-            properties: {
-                '@type': 'mail.collection',
-                version: 1,
-                total: 0,
-                unread: 0,
-                label: '',
-                role: null,
-                rank: 0,
-                subscribed: true,
-            },
+            properties: new CollectionPropertiesObject(),
         };
     }
 
@@ -34,8 +25,6 @@ export class CollectionObject implements CollectionInterface {
         this._data = data;
         if (data.properties) {
             this._data.properties = new CollectionPropertiesObject().fromJson(data.properties as CollectionPropertiesInterface);
-        } else {
-            this._data.properties = new CollectionPropertiesObject();
         }
         return this;
     }
@@ -114,12 +103,12 @@ export class CollectionPropertiesObject implements CollectionPropertiesInterface
 
     constructor() {
         this._data = {
-            '@type': 'mail.collection',
+            '@type': 'mail:collection',
             version: 1,
             total: 0,
             unread: 0,
-            label: '',
             role: null,
+            label: '',
             rank: 0,
             subscribed: true,
         };