solve a cosmetic issue in Extension Manager window

When the extension entry is not highlighted, replace LF to space
in description text, so words do not stick together in one line view.

desktop/source/deployment/gui/dp_gui_extlistbox.cxx

@@ -592,7 +592,7 @@ void ExtensionBox_Impl::DrawRow( const Rectangle& rRect, const TEntry_Impl pEntr
         aTextHeight = nIconHeight;
 
     // draw description
-    String sDescription;
+    ::rtl::OUString sDescription;
     if ( pEntry->m_sErrorText.Len() )
     {
         if ( pEntry->m_bActive )
@@ -616,6 +616,8 @@ void ExtensionBox_Impl::DrawRow( const Rectangle& rRect, const TEntry_Impl pEntr
     }
     else
     {
+        //replace LF to space, so words do not stick together in one line view
+        sDescription = sDescription.replace(0x000A, ' ');
         const long nWidth = GetTextWidth( sDescription );
         if ( nWidth > rRect.GetWidth() - aPos.X() )
             sDescription = GetEllipsisString( sDescription, rRect.GetWidth() - aPos.X() );