Fix: Show indexed coFloatsOrPercents options in unsaved changes dialog (#15472)

tests/libslic3r/test_preset_diff.cpp

@@ -33,3 +33,20 @@ TEST_CASE("deep_diff flags new vector entries that duplicate values[0]", "[Prese
     // specific to new indices rather than flagging the whole vector.
     REQUIRE(std::find(diff.begin(), diff.end(), "nozzle_diameter#0") == diff.end());
 }
+
+TEST_CASE("deep_diff distinguishes absolute and percentage speeds for each variant", "[PresetDiff][Config]")
+{
+    const size_t changed_index = GENERATE(size_t(0), size_t(1));
+    Preset reference(Preset::TYPE_PRINT, "ref");
+    reference.config.set_key_value("small_perimeter_speed", new ConfigOptionFloatsOrPercents{{50., false}, {50., false}});
+
+    Preset edited = reference;
+    edited.config.option<ConfigOptionFloatsOrPercents>("small_perimeter_speed")->values[changed_index].percent = true;
+
+    const auto diff = PresetCollection::dirty_options(&edited, &reference, /*deep_compare=*/true);
+    REQUIRE(diff == std::vector<std::string>{"small_perimeter_speed#" + std::to_string(changed_index)});
+
+    DynamicPrintConfig transferred = reference.config;
+    transferred.apply_only(edited.config, diff);
+    REQUIRE(*transferred.option("small_perimeter_speed") == *edited.config.option("small_perimeter_speed"));
+}