Make PulseAudioQt optional

Hopefully keeps those Pulseaudio deniers out pf my inbox

CMakeLists.txt

@@ -48,7 +48,7 @@ else()
     endif()
     find_package(Qca-qt5 ${QCA_MIN_VERSION} REQUIRED)
     if(NOT WIN32 AND NOT APPLE)
-        find_package(KF5PulseAudioQt REQUIRED)
+        find_package(KF5PulseAudioQt)
     endif()
     add_definitions(-DQT_NO_URL_CAST_FROM_STRING -DQT_NO_KEYWORDS -DQT_NO_CAST_FROM_ASCII)
 endif()

plugins/CMakeLists.txt

@@ -7,7 +7,6 @@ add_subdirectory(battery)
 add_subdirectory(sendnotifications)
 add_subdirectory(mpriscontrol)
 add_subdirectory(photo)
-add_subdirectory(systemvolume)
 add_subdirectory(remotecommands)
 add_subdirectory(mprisremote)
 add_subdirectory(remotecontrol)
@@ -31,12 +30,19 @@ if(NOT SAILFISHOS)
     endif()
     if(NOT WIN32 AND NOT APPLE)
         add_subdirectory(sftp)
+    endif()
+
+    if(KF5PulseAudioQt_FOUND)
         add_subdirectory(pausemusic)
     endif()
 
     if(Qt5Multimedia_FOUND AND KF5PulseAudioQt_FOUND)
         add_subdirectory(findthisdevice)
     endif()
+
+    if (WIN32 OR APPLE OR KF5PulseAudioQt_FOUND)
+        add_subdirectory(systemvolume)
+    endif()
 endif()