Resolves tdf#119447 - Improve sidebar height in start center

Reduced the font size multiplier from 1.4 to 1.2 to fit
the window into 768px height and added the branding image to
the height calculation

Change-Id: I05473155f0068880298a461fe8491468b07079b6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/134867
Tested-by: Jenkins
Reviewed-by: Heiko Tietze <heiko.tietze@documentfoundation.org>
diff --git a/sfx2/source/dialog/backingwindow.cxx b/sfx2/source/dialog/backingwindow.cxx
index 5879477..cde9a75 100644
--- a/sfx2/source/dialog/backingwindow.cxx
+++ b/sfx2/source/dialog/backingwindow.cxx
@@ -65,8 +65,11 @@ class BrandImage final : public weld::CustomWidgetController
private:
    BitmapEx maBrandImage;
    bool mbIsDark = false;
    Size m_BmpSize;

public:
    Size getSize() { return m_BmpSize; }

    virtual void SetDrawingArea(weld::DrawingArea* pDrawingArea) override
    {
        weld::CustomWidgetController::SetDrawingArea(pDrawingArea);
@@ -93,8 +96,8 @@ public:
        if (maBrandImage.GetSizePixel().Width() == nWidth)
            return;
        LoadImageForWidth(nWidth);
        const Size aBmpSize(maBrandImage.GetSizePixel());
        set_size_request(aBmpSize.Width(), aBmpSize.Height());
        m_BmpSize = maBrandImage.GetSizePixel();
        set_size_request(m_BmpSize.Width(), m_BmpSize.Height());
    }

    virtual void StyleUpdated() override
@@ -134,7 +137,7 @@ public:
};

// increase size of the text in the buttons on the left fMultiplier-times
float const g_fMultiplier = 1.4f;
float const g_fMultiplier = 1.2f;

BackingWindow::BackingWindow(vcl::Window* i_pParent)
    : InterimItemWindow(i_pParent, "sfx/ui/startcenter.ui", "StartCenter", false)
@@ -370,7 +373,7 @@ void BackingWindow::ApplyStyleSettings()
    // Refetch because the brand image height to match this width is now set
    aPrefSize = mxAllButtonsBox->get_preferred_size();

    set_height_request(nMenuHeight + aPrefSize.Height());
    set_height_request(nMenuHeight + aPrefSize.Height() + mxBrandImage->getSize().getHeight());
}

void BackingWindow::initializeLocalView()