-Fixed memory leak on rogue observable in history fragment.

-Removed stream id from playlist stream join table since only foreign constraint is needed.
-Added bar to playlist control UI.
-Modified local playlist fragment to no longer save when out of focus.

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

@@ -6,7 +6,8 @@
     android:layout_height="wrap_content"
     android:layout_marginBottom="12dp"
     android:background="?attr/selectableItemBackground"
-    android:clickable="true">
+    android:clickable="true"
+    android:focusable="true">
 
     <ImageView
         android:id="@+id/whatsNewIcon"