ENH: support msw_rescale

jira: [STUDIO-10907]
Change-Id: I1e06043fad6345c47e8c5ceb28db204955aa0969
(cherry picked from commit 193caabdc79d966e8226b5a9b340763b1711d0f3)

src/slic3r/GUI/SendMultiMachinePage.cpp

@@ -349,6 +349,8 @@ void SendMultiMachinePage::on_dpi_changed(const wxRect& suggested_rect)
         it->second->Refresh();
     }
 
+    if (m_mapping_popup) { m_mapping_popup->msw_rescale();}
+
     Fit();
     Layout();
     Refresh();