FIX: Cancel sequence number

Jira: STUDIO-2688
Change-Id: I29d992354713dcc8caaa8fc2ab98506f1b4e0735
(cherry picked from commit f7a69618813648b0c611c9dfbff3a0ad1d7a18d6)

src/slic3r/GUI/Plater.cpp

@@ -465,7 +465,7 @@ static struct DynamicFilamentList : DynamicList
             wxString str;
             std::string type;
             wxGetApp().preset_bundle->filaments.find_preset(presets[i])->get_filament_type(type);
-            str << (i + 1) << " - " << type;
+            str << type;
             items.push_back({str, icons[i]});
         }
         DynamicList::update();