Fix small issues in qt5 port

src/cadence.py

@@ -522,6 +522,8 @@ def initSystemChecks():
 
 # Wait while JACK restarts
 class ForceRestartThread(QThread):
+    progressChanged = pyqtSignal(int)
+
     def __init__(self, parent):
         QThread.__init__(self, parent)
 

src/shared_cadence.py

@@ -149,7 +149,7 @@ def stopAllAudioProcesses():
     process = QProcess()
 
     # Tell pulse2jack script to create files, prevents pulseaudio respawn
-    process.start("cadence-pulse2jack", "--dummy")
+    process.start("cadence-pulse2jack", ["--dummy"])
     process.waitForFinished()
 
     procsTerm = ["a2j", "a2jmidid", "artsd", "jackd", "jackdmp", "knotify4", "lash", "ladishd", "ladiappd", "ladiconfd", "jmcore"]