Reimplement default configuration

Now it uses real default values without having to set all the
    initial values.
    I a value is not found it will use the default one.

src/core/controller.cpp

@@ -38,8 +38,6 @@ Controller::Controller() : m_captureWindow(nullptr)
 {
     qApp->setQuitOnLastWindowClosed(false);
 
-    initDefaults();
-
     // init tray icon
 #if defined(Q_OS_LINUX)
     if (!ConfigHandler().disabledTrayIconValue()) {
@@ -63,16 +61,6 @@ Controller *Controller::getInstance() {
     return &c;
 }
 
-// initDefaults inits the global config in the first execution of the program
-void Controller::initDefaults() {
-    ConfigHandler config;
-    //config.setNotInitiated();
-    if (!config.initiatedIsSet()) {
-        config.setDefaults();
-        config.setInitiated();
-    }
-}
-
 // creation of a new capture in GUI mode
 void Controller::createVisualCapture(const uint id, const QString &forcedSavePath) {
     if (!m_captureWindow) {