Method changeActiveAccount

launcher/ui/MainWindow.cpp:1123–1140

* Assumes the sender is a QAction */

 * Assumes the sender is a QAction
 */
void MainWindow::changeActiveAccount()
{
    QAction *sAction = (QAction *)sender();

    // Profile's associated Mojang username
    if (sAction->data().type() != QVariant::Type::Int)
        return;

    QVariant data = sAction->data();
    bool valid = false;
    int index = data.toInt(&valid);
    if(!valid) {
        index = -1;
    }
    auto accounts = APPLICATION->accounts();
    accounts->setDefaultAccount(index == -1 ? nullptr : accounts->at(index));
    defaultAccountChanged();
}

void MainWindow::defaultAccountChanged()
{