Fixed build warnings and undo changes

- Build problems:
    - Qt 5.13 obsoleted some calls that were used in our Qt library.
    - The PhilipsHueLight and PhilipsHueBridge classes did not use the private logger class
- Undo changes:
    - In Commit e6c2e7e, I made changes that were not covered. An apology goes to @b1rdhous3

Signed-off-by: Paulchen-Panther <Paulchen-Panter@protonmail.com>

libsrc/leddevice/dev_net/LedDevicePhilipsHue.h

@@ -92,7 +92,7 @@ class PhilipsHueBridge : public QObject
 	Q_OBJECT
 
 private:
-	Logger* log;
+	Logger* _log;
 	/// QNetworkAccessManager  for sending requests.
 	QNetworkAccessManager manager;
 	/// Ip address of the bridge
@@ -138,7 +138,7 @@ public:
 class PhilipsHueLight
 {
 private:
-	Logger* log;
+	Logger* _log;
 	PhilipsHueBridge* bridge;
 	/// light id
 	unsigned int id;