"Clear Playlist" button doesn't look like a button that would clear the Playlist
The clear playlist button which currently has the document-new icon and a default button style doesn't look like it would clear your playlist (I get it new playlist, but that's after the tooltip is displayed or worse it clears your playlist (tooltips don't really work on mobile))
I'd suggest changing the icon to list-remove-all and adding the destructive-action style class.
Since I can't open merge requests here is the diff of the changes described above:
diff --git a/src/extended-interface.vala b/src/extended-interface.vala
index cb63e61..2cdc984 100644
--- a/src/extended-interface.vala
+++ b/src/extended-interface.vala
@@ -62,8 +62,9 @@ namespace Xfmpc {
button.clicked.connect (cb_playlist_clear);
hbox.pack_start (button, false, false, 0);
- var image = new Gtk.Image.from_icon_name ("document-new", Gtk.IconSize.MENU);
+ var image = new Gtk.Image.from_icon_name ("list-remove-all", Gtk.IconSize.MENU);
button.set_image (image);
+ button.get_style_context() .add_class ("destructive-action");
button = new Gtk.Button ();
button.set_tooltip_text (_("Refresh Database"));