Fix drawing sheet border random thickness glitch.

(cherry picked from commit 26c8c718eb)

common/drawing_sheet/ds_painter.cpp

@@ -356,5 +356,6 @@ void KIGFX::DS_PAINTER::DrawBorder( const PAGE_INFO* aPageInfo, int aScaleFactor
     // Use a gray color for the border color
     m_gal->SetStrokeColor( m_renderSettings.m_pageBorderColor );
     m_gal->SetIsFill( false );
+    m_gal->SetLineWidth( m_renderSettings.GetDefaultPenWidth() );
     m_gal->DrawRectangle( origin, end );
 }