fix regression: add back OnTapped handler to artist image

ui/browsing/artistpage.go

@@ -253,6 +253,11 @@ func NewArtistPageHeader(page *ArtistPage) *ArtistPageHeader {
 		SizeName: theme.SizeNameHeadingText,
 	}
 	a.artistImage = widgets.NewImagePlaceholder(res.ResPeopleInvertPng, 225)
+	a.artistImage.OnTapped = func() {
+		if im := a.artistImage.Image(); im != nil {
+			a.artistPage.contr.ShowPopUpImage(im)
+		}
+	}
 	a.favoriteBtn = widgets.NewFavoriteButton(func() { go a.toggleFavorited() })
 	a.playBtn = widget.NewButtonWithIcon("Play Discography", theme.MediaPlayIcon(), page.playAllTracks)
 	a.playRadioBtn = widget.NewButtonWithIcon("Play Artist Radio", res.ResShuffleInvertSvg, page.playArtistRadio)

ui/widgets/imageplaceholder.go

@@ -14,7 +14,7 @@ import (
 type ImagePlaceholder struct {
 	widget.BaseWidget
 	container *fyne.Container
-	haveImage bool
+	image     image.Image
 	minSize   float32
 
 	OnTapped func()
@@ -44,11 +44,12 @@ type CanvasImage interface {
 }
 
 func (i *ImagePlaceholder) HaveImage() bool {
-	return i.haveImage
+	return i.image != nil
 }
 
 func (i *ImagePlaceholder) SetImage(img image.Image, tappable bool) {
 	var cIm CanvasImage
+	i.image = img
 	if tappable {
 		cImg := NewTappableImage(i.onTapped)
 		cImg.Image.Image = img
@@ -63,7 +64,10 @@ func (i *ImagePlaceholder) SetImage(img image.Image, tappable bool) {
 	i.container.RemoveAll()
 	i.container.Add(cIm)
 	i.container.Refresh()
-	i.haveImage = true
+}
+
+func (i *ImagePlaceholder) Image() image.Image {
+	return i.image
 }
 
 func (i *ImagePlaceholder) onTapped() {