In ListItem_OnClick(): Hide/unparent the highlight texture and kill the tooltips - both were getting stuck when closing expanded entries.

diff --git a/Frame.lua b/Frame.lua
index ad0f37b..e9961ee 100644
--- a/Frame.lua
+++ b/Frame.lua
@@ -2520,6 +2520,12 @@ do
 				end
 			end
 		end
+		highlight:Hide()
+		highlight:ClearAllPoints()
+		highlight:SetParent(nil)
+		QTip:Release(acquire_tip)
+		spell_tip:Hide()
+
 		MainPanel.scroll_frame:Update(false, true)
 	end