compute playlist delegate height based on font size

src/qml/BaseTheme.qml

@@ -42,14 +42,6 @@ Item {
     property int layoutHorizontalMargin: 8
     property int layoutVerticalMargin: 6
 
-    // FIXME: don't hardcode these; derive them from the layouts they're used in
-    FontMetrics {
-        id: playListTrackTextHeight
-        font.weight: Font.Bold
-    }
-    property int playListDelegateHeight: (playListTrackTextHeight.height > 28) ? playListTrackTextHeight.height : 28
-    // END FIXME
-
     property int playListAlbumArtSize: 60
 
     property int coverImageSize: 180

src/qml/PlayListEntry.qml

@@ -56,12 +56,18 @@ FocusScope {
     Accessible.role: Accessible.ListItem
     Accessible.name: title + ' ' + album + ' ' + artist
 
+    TextMetrics {
+        id: mainCompactLabelSize
+        font: mainCompactLabel.font
+        text: mainCompactLabel.text
+    }
+
     Keys.onReturnPressed: {
         playListEntry.switchToTrack(playListEntry.index)
         playListEntry.startPlayback()
     }
 
-    height: elisaTheme.playListDelegateHeight
+    height: mainCompactLabelSize.height + 2 * elisaTheme.layoutVerticalMargin
 
     Loader {
         id: metadataLoader