Remove use of global state from InfoBar

It is initialized by the core plugin anyhow, so give it enough
information there to avoid accessing the global state later.

Change-Id: I39e7a9f32ef5c7930faf9ba751e75bebf57b507e
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/coreplugin/coreplugin.cpp

@@ -159,7 +159,7 @@ bool CorePlugin::initialize(const QStringList &arguments, QString *errorMessage)
         addObject(m_editMode);
         ModeManager::activateMode(m_editMode->id());
         m_designMode = new DesignMode;
-        InfoBar::initializeGloballySuppressed();
+        InfoBar::initialize(ICore::settings(), creatorTheme());
     }
 
     IWizardFactory::initialize();