Update SELECTION_TOOL when loading footprint editor settings.

Fixes https://gitlab.com/kicad/code/kicad/issues/6641

pcbnew/footprint_edit_frame.cpp

@@ -508,6 +508,8 @@ void FOOTPRINT_EDIT_FRAME::LoadSettings( APP_SETTINGS_BASE* aCfg )
 
     m_displayOptions  = cfg->m_Display;
     m_defaultLibWidth = cfg->m_LibWidth;
+
+    GetToolManager()->GetTool<SELECTION_TOOL>()->GetFilter() = cfg->m_SelectionFilter;
     m_selectionFilterPanel->SetCheckboxesFromFilter( cfg->m_SelectionFilter );
 }