tdf#139811 trigger layout when content changes

in writer styles panel of page deck which is similar to the draw case
of tdf#143795. Doing this always in PanelLayout::queue_resize might
make the most sense rather than these manual triggers, but do it this
way initially for a safe backport.

Change-Id: I4bd2e9cb9d52b66a73cd0615406052e19e6e8b51
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/120369
Tested-by: Jenkins
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
diff --git a/sw/source/uibase/sidebar/PageStylesPanel.cxx b/sw/source/uibase/sidebar/PageStylesPanel.cxx
index 1815466..6426007 100644
--- a/sw/source/uibase/sidebar/PageStylesPanel.cxx
+++ b/sw/source/uibase/sidebar/PageStylesPanel.cxx
@@ -27,6 +27,7 @@
#include <svx/xbtmpit.hxx>
#include <svx/SvxNumOptionsTabPageHelper.hxx>
#include "PageStylesPanel.hxx"
#include <sfx2/sidebar/Panel.hxx>
#include <sfx2/dispatch.hxx>
#include <sfx2/bindings.hxx>
#include <sfx2/objsh.hxx>
@@ -249,6 +250,11 @@ void PageStylesPanel::Update()
        default:
            break;
    }

    // Need to do a relayouting, otherwise the panel size is not updated after show / hide controls
    sfx2::sidebar::Panel* pPanel = dynamic_cast<sfx2::sidebar::Panel*>(GetParent());
    if (pPanel)
        pPanel->TriggerDeckLayouting();
}

Color const & PageStylesPanel::GetColorSetOrDefault()