Vcs: Use PagedSettings for all plugin settings

Hopefully the last structural change for a while.

Settings lifetime is again tied to the plugin private.

Change-Id: I221e8b8baa69422306191b48a9f034ef5b1a0dc2
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/bazaar/bazaarplugin.cpp

@@ -215,8 +215,8 @@ public:
     void createRepositoryActions(const Core::Context &context);
 
     // Variables
+    BazaarSettings m_setting;
     BazaarClient m_client;
-    BazaarSettingsPage m_settingPage;
 
     VcsSubmitEditorFactory m_submitEditorFactory {
         submitEditorParameters,