Sessions: introduce SessionView

This will replace the simple session list in
SessionManager UI.

Change-Id: Idec2fa2e4629b9986a5d274d6da5129e779e2100
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/projectexplorer/sessionmodel.cpp

@@ -45,6 +45,16 @@ SessionModel::SessionModel(QObject *parent)
             this, &SessionModel::resetSessions);
 }
 
+int SessionModel::indexOfSession(const QString &session)
+{
+    return SessionManager::sessions().indexOf(session);
+}
+
+QString SessionModel::sessionAt(int row)
+{
+    return SessionManager::sessions().value(row, QString());
+}
+
 int SessionModel::rowCount(const QModelIndex &) const
 {
     return SessionManager::sessions().count();