tdf#101254: Enable arrowheads in sidebar for draws

It's enabled in Line and Filling toolbar so do the same
in the sidebar

Change-Id: Icc64705268a9efb46ab463131ddf486dad12f085
Reviewed-on: https://gerrit.libreoffice.org/58747Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Jenkins
Reviewed-by: Xisco Faulí <xiscofauli@libreoffice.org>

svx/source/sidebar/line/LinePropertyPanel.cxx

@@ -188,6 +188,7 @@ void LinePropertyPanel::HandleContextChange(
     {
         case CombinedEnumContext(Application::Calc, Context::DrawLine):
         case CombinedEnumContext(Application::DrawImpress, Context::DrawLine):
+        case CombinedEnumContext(Application::DrawImpress, Context::Draw):
         case CombinedEnumContext(Application::WriterVariants, Context::Draw):
             // TODO : Implement DrawLine context in Writer
             bShowArrows = true;