Update to V169 - Now compiles under QT 5.9 (LTS). Fixed some warnings,

switched to using system QTScintilla library on Linux. This prevents
you from needing to compile it yourself, added preliminary support for
three buses with a GVRET device (for Macchina M2 boards)

connections/connectionwindow.cpp

@@ -485,10 +485,7 @@ void ConnectionWindow::handleRevert()
 bool ConnectionWindow::isSocketCanAvailable()
 {
 #ifdef Q_OS_LINUX
-    for (const auto &backend : QCanBus::instance()->plugins()) {
-        if (backend == "socketcan")
-            return true;
-    }
+    if (QCanBus::instance()->plugins().contains(QStringLiteral("socketcan"))) return true;
 #endif
     return false;
 }