New context with albums and lyrics +++ much more

* Added new lyrics provider with lyrics from AudD and API Seeds
* New improved context widget with albums and lyrics
* Fixed playing and context widget getting stuck in play mode when there was an error
* Changed icons for artists in collection, tidal and cover manager
* Removed "search" icon from "Search automatically" checkbox (right click) that looked ugly
* Removed some unused widgets from the src/widgets directory
* Fixed initial size of window and side panel
* Fixed saving window size correctly

src/covermanager/albumcoverchoicecontroller.cpp

@@ -79,7 +79,7 @@ AlbumCoverChoiceController::AlbumCoverChoiceController(QWidget *parent) :
   unset_cover_ = new QAction(IconLoader::Load("list-remove"), tr("Unset cover"), this);
   show_cover_ = new QAction(IconLoader::Load("zoom-in"), tr("Show fullsize..."), this);
 
-  search_cover_auto_ = new QAction(IconLoader::Load("search"), tr("Search automatically"), this);
+  search_cover_auto_ = new QAction(tr("Search automatically"), this);
   search_cover_auto_->setCheckable(true);
   search_cover_auto_->setChecked(false);
 

src/covermanager/albumcoverfetchersearch.h

@@ -58,26 +58,26 @@ class AlbumCoverFetcherSearch : public QObject {
 
   CoverSearchStatistics statistics() const { return statistics_; }
 
-signals:
+ signals:
   // It's the end of search (when there was no fetch-me-a-cover request).
-  void SearchFinished(quint64, const CoverSearchResults& results);
+  void SearchFinished(quint64, const CoverSearchResults &results);
 
   // It's the end of search and we've fetched a cover.
   void AlbumCoverFetched(quint64, const QImage &cover);
 
-private slots:
+ private slots:
   void ProviderSearchFinished(int id, const QList<CoverSearchResult> &results);
   void ProviderCoverFetchFinished(RedirectFollower *reply);
   void TerminateSearch();
 
-private:
+ private:
   void AllProvidersFinished();
 
   void FetchMoreImages();
   float ScoreImage(const QImage &image) const;
   void SendBestImage();
 
-private:
+ private:
   static const int kSearchTimeoutMs;
   static const int kImageLoadTimeoutMs;
   static const int kTargetSize;

src/covermanager/albumcoverloader.cpp

@@ -226,6 +226,7 @@ void AlbumCoverLoader::RemoteFetchFinished(QNetworkReply *reply) {
   }
 
   NextState(&task);
+  
 }
 
 QImage AlbumCoverLoader::ScaleAndPad(const AlbumCoverLoaderOptions &options, const QImage &image) {

src/covermanager/albumcovermanager.cpp

@@ -92,9 +92,8 @@ AlbumCoverManager::AlbumCoverManager(Application *app, CollectionBackend *collec
       cover_searcher_(nullptr),
       cover_export_(nullptr),
       cover_exporter_(new AlbumCoverExporter(this)),
-      artist_icon_(IconLoader::Load("guitar" )),
-      all_artists_icon_(IconLoader::Load("cd" )),
-      //no_cover_icon_(IconLoader::Load("nocover")),
+      artist_icon_(IconLoader::Load("folder-sound" )),
+      all_artists_icon_(IconLoader::Load("vinyl" )),
       no_cover_icon_(":/pictures/noalbumart.png"),
       no_cover_image_(GenerateNoCoverImage(no_cover_icon_)),
       no_cover_item_icon_(QPixmap::fromImage(no_cover_image_)),

src/covermanager/amazoncoverprovider.cpp

@@ -111,7 +111,7 @@ void AmazonCoverProvider::QueryFinished(QNetworkReply *reply, int id) {
     
   reply->deleteLater();
   
-  QString data=(QString)reply->readAll();
+  QString data(reply->readAll());
 
   CoverSearchResults results;
 

src/covermanager/lastfmcoverprovider.h

@@ -37,7 +37,7 @@
 class LastFmCoverProvider : public CoverProvider {
   Q_OBJECT
 
-public:
+ public:
   explicit LastFmCoverProvider(QObject *parent = nullptr);
 
   bool StartSearch(const QString &artist, const QString &album, int id);
@@ -45,10 +45,10 @@ public:
   static const char *kApiKey;
   static const char *kSecret;
 
-private slots:
+ private slots:
   void QueryFinished(QNetworkReply *reply, int id);
 
-private:
+ private:
   QNetworkAccessManager *network_;
   QMap <QNetworkReply *, int> pending_queries_;