Add Spotify support

src/engine/enginebase.cpp

@@ -37,6 +37,9 @@
 #include "enginebase.h"
 #include "settings/backendsettingspage.h"
 #include "settings/networkproxysettingspage.h"
+#ifdef HAVE_SPOTIFY
+#  include "settings/spotifysettingspage.h"
+#endif
 
 EngineBase::EngineBase(QObject *parent)
     : QObject(parent),
@@ -239,6 +242,15 @@ void EngineBase::ReloadSettings() {
 
   s.endGroup();
 
+#ifdef HAVE_SPOTIFY
+  s.beginGroup(SpotifySettingsPage::kSettingsGroup);
+  spotify_username_ = s.value("username").toString();
+  QByteArray password = s.value("password").toByteArray();
+  if (password.isEmpty()) spotify_password_.clear();
+  else spotify_password_ = QString::fromUtf8(QByteArray::fromBase64(password));
+  s.endGroup();
+#endif
+
 }
 
 void EngineBase::EmitAboutToFinish() {