sidebar: Give child TagRows an indented look

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

sidebar/tagbox.py

@@ -90,6 +90,7 @@ class ParentTagBox(TagBox):
 
     def on_child_tag_added(self, tag):
         tag.widgets = tagrow.TagRow(tag, self.childicon)
+        tag.widgets.set_margin_start(35)
         tag.parent.widgets.add_child(tag.widgets)
         tag.TrackAdded.register(self.tag_changed)
         tag.TrackRemoved.register(self.tag_changed)

sidebar/test_tagbox.py

@@ -138,6 +138,7 @@ class TestParentTagBox(unittest.TestCase):
         tag1 = superstore.add(tag, "child", fake.Track(1))
         ptbox.bus.complete()
         self.assertIsInstance(tag1.widgets, tagrow.TagRow)
+        self.assertEqual(tag1.widgets.get_margin_start(), 35)
 
         superstore.remove(tag1)
         ptbox.bus.complete()