SL-17000 improve error message for physics mesh import

indra/newview/skins/default/xui/en/floater_model_preview.xml

@@ -34,7 +34,7 @@
   <string name="mesh_status_missing_lod">Missing required level of detail.</string>
   <string name="mesh_status_invalid_material_list">LOD materials are not a subset of reference model.</string>
   <string name="phys_status_vertex_limit_exceeded">Some physical hulls exceed vertex limitations.</string>
-  <string name="phys_status_degenerate_triangles">The physics mesh too dense remove the small thin triangles (see preview)</string>
+  <string name="phys_status_degenerate_triangles">The physics mesh contains degenerate triangles. Use Analyze/Simplify to resolve.</string>
   <string name="layer_all">All</string> <!-- Text to display in physics layer combo box for "all layers" -->
   <string name="decomposing">Analyzing...</string>
   <string name="simplifying">Simplifying...</string>