reset focus whenever navigating between pages, not just back/forward

ui/browsing/browsingpane.go

@@ -197,6 +197,10 @@ func (b *BrowsingPane) doSetPage(p Page) bool {
 	if b.curPage != nil && b.curPage.Route() == p.Route() {
 		return false
 	}
+	// TODO: reset focus only if something inside the previous page had focus
+	if c := fyne.CurrentApp().Driver().CanvasForObject(b); c != nil {
+		c.Focus(nil)
+	}
 	b.curPage = p
 	if np, ok := p.(CanShowNowPlaying); ok {
 		// inform page of currently playing track

ui/mainwindow.go

@@ -268,14 +268,11 @@ func (m *MainWindow) addShortcuts() {
 	for _, sh := range os.BackShortcuts {
 		m.Canvas().AddShortcut(&sh, func(_ fyne.Shortcut) {
 			m.BrowsingPane.GoBack()
-			// TODO: reset focus only if something inside the page had focus
-			m.Canvas().Focus(nil)
 		})
 	}
 	for _, sh := range os.ForwardShortcuts {
 		m.Canvas().AddShortcut(&sh, func(_ fyne.Shortcut) {
 			m.BrowsingPane.GoForward()
-			m.Canvas().Focus(nil)
 		})
 	}
 	if os.SettingsShortcut != nil {