-Fixed playlist creation icon in playlist append dialog.

-Fixed bookmarking disposable not part of playlist fragment lifecycle.
-Rearranged local fragment directory structure.

app/src/main/res/layout/dialog_playlists.xml

@@ -19,7 +19,7 @@
             android:layout_centerVertical="true"
             android:layout_marginLeft="12dp"
             android:layout_marginRight="12dp"
-            android:src="?attr/palette"
+            android:src="?attr/ic_playlist_add"
             tools:ignore="ContentDescription,RtlHardcoded"/>
 
         <TextView