make sure to always update itemForID maps for focus traversal

ui/browsing/genrespage.go

@@ -197,9 +197,9 @@ func NewGenreList(sorting widgets.ListHeaderSort) *GenreList {
 		},
 		func(id widget.ListItemID, item fyne.CanvasObject) {
 			row := item.(*GenreListRow)
+			a.list.SetItemForID(id, row)
 			if row.Item != a.genres[id] {
 				row.EnsureUnfocused()
-				a.list.SetItemForID(id, row)
 				row.ListItemID = id
 				row.Item = a.genres[id]
 				row.nameLabel.Text = row.Item.Name

ui/widgets/gridview.go

@@ -289,18 +289,18 @@ func (g *GridView) doUpdateItemCard(itemIdx int, card *GridViewItem) {
 	if itemIdx < len(g.items) {
 		item = g.items[itemIdx]
 	}
-	card.Cover.Im.CenterIcon = g.Placeholder
-	if !card.NeedsUpdate(item) && card.ItemIndex == itemIdx {
-		// nothing to do
-		g.stateMutex.Unlock()
-		return
-	}
 	// update itemForIndex map
 	if c, ok := g.itemForIndex[card.ItemIndex]; ok && c == card {
 		delete(g.itemForIndex, card.ItemIndex)
 	}
 	card.ItemIndex = itemIdx
 	g.itemForIndex[itemIdx] = card
+	card.Cover.Im.CenterIcon = g.Placeholder
+	if !card.NeedsUpdate(item) && card.ItemIndex == itemIdx {
+		// nothing to do
+		g.stateMutex.Unlock()
+		return
+	}
 	g.stateMutex.Unlock()
 	card.Update(item)
 	card.ImgLoader.Load(item.CoverArtID)

ui/widgets/tracklist.go

@@ -168,8 +168,8 @@ func NewTracklist(tracks []*mediaprovider.Track) *Tracklist {
 			t.tracksMutex.RUnlock()
 
 			tr := item.(*TrackRow)
+			t.list.SetItemForID(itemID, tr)
 			if tr.trackID != model.track.ID || tr.ListItemID != itemID {
-				t.list.SetItemForID(itemID, tr)
 				tr.ListItemID = itemID
 			}
 			i := -1 // signal that we want to display the actual track num.