tdf#92217: The infobar text should have a transparent background...

...instead of setting background at various places.

Change-Id: Idfa6a36bcb2aefbb33a7647725098f4eea0f93c4
Reviewed-on: https://gerrit.libreoffice.org/19347Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

sfx2/source/dialog/infobar.cxx

@@ -127,12 +127,13 @@ SfxInfoBarWindow::SfxInfoBarWindow(vcl::Window* pParent, const OUString& sId,
     SetPosSizePixel(Point(0, 0), Size(nWidth, INFO_BAR_BASE_HEIGHT * nScaleFactor));
 
     m_pMessage->SetText(sMessage);
-    m_pMessage->SetBackground(Wallpaper(Color(constLightColor)));
     m_pMessage->Show();
 
     m_pCloseBtn->SetClickHdl(LINK(this, SfxInfoBarWindow, CloseHandler));
     m_pCloseBtn->Show();
 
+    EnableChildTransparentMode();
+
     Resize();
 }
 
@@ -173,9 +174,6 @@ void SfxInfoBarWindow::Paint(vcl::RenderContext& rRenderContext, const Rectangle
     BColor aDarkColor;
     lclDetermineLightDarkColor(aLightColor, aDarkColor);
 
-    // Update the label background color
-    m_pMessage->SetBackground(Wallpaper(Color(aLightColor)));
-
     // Light background
     B2DPolygon aPolygon;
     aPolygon.append(B2DPoint(aRect.Left(), aRect.Top()));