message: Modify SingleApplication to staging and prod at once (linux)
diff: #include <QtNetwork/QLocalSocket>
  #include <QFileInfo>
  +#include "toggl_api.h"
  +
  #define TIMEOUT_MS (500)
  SingleApplication::SingleApplication(int &argc, char **argv)
  @@ -14,6 +16,8 @@ SingleApplication::SingleApplication(int &argc, char **argv)
  , local_server_(nullptr) {
  server_name_ = QFileInfo(
  QCoreApplication::applicationFilePath()).fileName();
  + if (toggl_get_server_type() == TogglServerStaging)
  + server_name_.append("-staging");
  initLocalConnection();
  }
  