tdf#139329: Shift widgets down and make hatch&bitmap list visible

regression from commit cbe86ee37018dc4bf04783ecf70fef2863e61ad7
which inserted additional gradient colour picker but didn't
adjust the positions of widgets below accordingly so in effect
there were 2 widgets at position y=4

Sad that neither glade nor our own code detects this condition and
e.g. asserts or warns this is the case

Change-Id: I4c635eeb8b740765542631a5f0319bfe1a5d94d0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/115056
Tested-by: Jenkins
Reviewed-by: Katarina Behrens <bubli@bubli.org>
diff --git a/sd/uiconfig/simpress/ui/sidebarslidebackground.ui b/sd/uiconfig/simpress/ui/sidebarslidebackground.ui
index 9ee6a42..13163da 100644
--- a/sd/uiconfig/simpress/ui/sidebarslidebackground.ui
+++ b/sd/uiconfig/simpress/ui/sidebarslidebackground.ui
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