refactoring: UI squawk now belongs to a new class, it enables me doing trayed mode, when main window is destroyed

shared/global.h

@@ -42,18 +42,11 @@
 #include <QProcess>
 #include <QDesktopServices>
 #include <QRegularExpression>
-#include <QDBusInterface>
-
-class Squawk;
-namespace Models {
-    class Roster;
-}
 
 namespace Shared {
     
     class Global {
         Q_DECLARE_TR_FUNCTIONS(Global)
-        friend class ::Squawk;
     public:
         struct FileInfo {
             enum class Preview {
@@ -71,8 +64,6 @@ namespace Shared {
         
         Global();
 
-        static void notify(const QString& account, const Shared::Message& msg);
-
         static Global* getInstance();
         static QString getName(Availability av);
         static QString getName(ConnectionState cs);
@@ -130,8 +121,6 @@ namespace Shared {
         
     private:
         static Global* instance;
-        Models::Roster* rosterModel;
-        QDBusInterface dbus;
         
         std::map<QString, bool> pluginSupport;
         std::map<QString, FileInfo> fileCache;