tdf#100024: uitest: add comment to existing test

Change-Id: I120f54616df5c7399707b174b7609f6a82e1183c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/110269
Tested-by: Jenkins
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
diff --git a/uitest/impress_tests/backgrounds.py b/uitest/impress_tests/backgrounds.py
index de4a349..123c7ef 100644
--- a/uitest/impress_tests/backgrounds.py
+++ b/uitest/impress_tests/backgrounds.py
@@ -122,6 +122,8 @@ class ImpressBackgrounds(UITestCase):
            xBtn = xPageSetupDlg.getChild(button)
            xBtn.executeAction("CLICK", tuple())

            # tdf#100024: Without the fix in place, this test would have crashed here
            # changing the background to bitmap
            xOkBtn = xPageSetupDlg.getChild("ok")
            xOkBtn.executeAction("CLICK", tuple())