Grid line color change for SvxPixelCtl

Change-Id: I0a7c0f2f8da9323a341fe378dcb7ef596aa133af
Reviewed-on: https://gerrit.libreoffice.org/26884Reviewed-by: Heiko Tietze <tietze.heiko@googlemail.com>
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Rishabh Kumar <kris.kr296@yahoo.in>

svx/source/dialog/dlgctrl.cxx

@@ -808,7 +808,7 @@ SvxPixelCtl::SvxPixelCtl(vcl::Window* pParent, sal_uInt16 nNumber)
     assert(nLines); // can't have no lines
     SetPixelColor( Color( COL_BLACK ) );
     SetBackgroundColor( Color( COL_WHITE ) );
-    SetLineColor( Application::GetSettings().GetStyleSettings().GetShadowColor() );
+    SetLineColor( Color( COL_LIGHTGRAY ) );
 
     nSquares = nLines * nLines;
     pPixel = new sal_uInt16[ nSquares ];