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

data/style/statusview.css

@@ -1,11 +0,0 @@
-StatusView {
-  background: white;
-  background-color: white;
-}
-QVBoxLayout {
-  background: white;
-  background-color: white;
-}
-QScrollArea {
-  background: qpalette(base);
-}

data/style/strawberry.css

@@ -52,3 +52,20 @@ darwin {
 darwin QMenu {
   font-size: 13pt;
 }
+
+#scrollarea_play {
+  background-color: white;
+  font: 11pt;
+}
+
+#scrollarea_stop {
+  background-color: white;
+  font: 11pt;
+}
+
+#scrollAreaWidgetContents_stop {
+  background-color: white;
+}
+#scrollAreaWidgetContents_play {
+  background-color: white;
+}