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/core/iconloader.h

@@ -27,14 +27,10 @@
 
 class IconLoader {
  public:
-
-  static void Init();
-  static QIcon Load(const QString &name);
-
+  static QIcon Load(const QString &name, const int size = 0);
 private:
   IconLoader() {}
-
-  static QList<int> sizes_;
 };
 
 #endif // ICONLOADER_H
+