Refactor crashpad initialization

Crashpad handler was initialized quite late since we were waiting for settings. However the settings in crashpad are persistent itself, hence we can start it at the earliest possible time and change the upload settings independently later. The only prerequisite is to have QCoreApplication constructed in order for the application name to be available.
ref T652

src/blackmisc/filelogger.h

@@ -32,16 +32,6 @@ namespace BlackMisc
         //! Filename defaults to QCoreApplication::applicationName() and path to "."
         CFileLogger(QObject *parent = nullptr);
 
-        /*!
-         * Constructor
-         * \param applicationName Use the applications name without any extension.
-         *                        A timestamp and extension will be added automatically.
-         * \param logPath Path the log files is written to. If you leave this empty, the
-         *                file will be written in the working directory of the binary.
-         * \param parent QObject parent
-         */
-        CFileLogger(const QString &applicationName, const QString &logPath, QObject *parent = nullptr);
-
         //! Destructor.
         virtual ~CFileLogger();
 
@@ -51,20 +41,18 @@ namespace BlackMisc
         //! Close file
         void close();
 
-        //! Get the current log file path
-        QString getLogFilePath() const { return m_logFile.fileName(); }
+        //! Get the log file name
+        static QString getLogFileName();
 
-        //! Get the current log file name
-        QString getLogFileName() const { return m_fileName; }
+        //! Get the log file path (including its name)
+        static QString getLogFilePath();
 
     private slots:
         //! Write single status message to file
         void ps_writeStatusMessageToFile(const BlackMisc::CStatusMessage &statusMessage);
 
     private:
-        QString getFullFileName();
         void removeOldLogFiles();
-
         void writeHeaderToFile();
         void writeContentToFile(const QString &content);
 
@@ -72,8 +60,6 @@ namespace BlackMisc
         QFile m_logFile;
         QString m_fileName;
         QTextStream m_stream;
-        QString m_applicationName;
-        QString m_logPath; //!< Empty by default. Hence the working directory "." is used
         QString m_previousCategories;
     };
 }