Tweak the "Auto" editor setting hints to be more indicative

This affects the editor scale and font hinting settings which will now
display their automatically chosen value in parentheses.

editor/editor_node.cpp

@@ -5581,6 +5581,8 @@ EditorNode::EditorNode() {
 		switch (display_scale) {
 			case 0: {
 				// Try applying a suitable display scale automatically.
+				// The code below is adapted in `editor/editor_settings.cpp` and `editor/project_manager.cpp`.
+				// Make sure to update those when modifying the code below.
 #ifdef OSX_ENABLED
 				editor_set_scale(DisplayServer::get_singleton()->screen_get_max_scale());
 #else

editor/editor_settings.cpp

@@ -326,7 +326,26 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 
 	// Editor
 	_initial_set("interface/editor/display_scale", 0);
-	hints["interface/editor/display_scale"] = PropertyInfo(Variant::INT, "interface/editor/display_scale", PROPERTY_HINT_ENUM, "Auto,75%,100%,125%,150%,175%,200%,Custom", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
+	// Display what the Auto display scale setting effectively corresponds to.
+	// The code below is adapted in `editor/editor_node.cpp` and `editor/project_manager.cpp`.
+	// Make sure to update those when modifying the code below.
+#ifdef OSX_ENABLED
+	float scale = DisplayServer::get_singleton()->screen_get_max_scale();
+#else
+	const int screen = DisplayServer::get_singleton()->window_get_current_screen();
+	float scale;
+	if (DisplayServer::get_singleton()->screen_get_dpi(screen) >= 192 && DisplayServer::get_singleton()->screen_get_size(screen).y >= 1400) {
+		// hiDPI display.
+		scale = 2.0;
+	} else if (DisplayServer::get_singleton()->screen_get_size(screen).y <= 800) {
+		// Small loDPI display. Use a smaller display scale so that editor elements fit more easily.
+		// Icons won't look great, but this is better than having editor elements overflow from its window.
+		scale = 0.75;
+	} else {
+		scale = 1.0;
+	}
+#endif
+	hints["interface/editor/display_scale"] = PropertyInfo(Variant::INT, "interface/editor/display_scale", PROPERTY_HINT_ENUM, vformat("Auto (%d%%),75%%,100%%,125%%,150%%,175%%,200%%,Custom", Math::round(scale * 100)), PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
 	_initial_set("interface/editor/custom_display_scale", 1.0f);
 	hints["interface/editor/custom_display_scale"] = PropertyInfo(Variant::FLOAT, "interface/editor/custom_display_scale", PROPERTY_HINT_RANGE, "0.5,3,0.01", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
 	_initial_set("interface/editor/main_font_size", 14);
@@ -339,7 +358,11 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 	_initial_set("interface/editor/code_font_custom_variations", "");
 	_initial_set("interface/editor/font_antialiased", true);
 	_initial_set("interface/editor/font_hinting", 0);
-	hints["interface/editor/font_hinting"] = PropertyInfo(Variant::INT, "interface/editor/font_hinting", PROPERTY_HINT_ENUM, "Auto,None,Light,Normal", PROPERTY_USAGE_DEFAULT);
+#ifdef OSX_ENABLED
+	hints["interface/editor/font_hinting"] = PropertyInfo(Variant::INT, "interface/editor/font_hinting", PROPERTY_HINT_ENUM, "Auto (None),None,Light,Normal", PROPERTY_USAGE_DEFAULT);
+#else
+	hints["interface/editor/font_hinting"] = PropertyInfo(Variant::INT, "interface/editor/font_hinting", PROPERTY_HINT_ENUM, "Auto (Light),None,Light,Normal", PROPERTY_USAGE_DEFAULT);
+#endif
 	_initial_set("interface/editor/main_font", "");
 	hints["interface/editor/main_font"] = PropertyInfo(Variant::STRING, "interface/editor/main_font", PROPERTY_HINT_GLOBAL_FILE, "*.ttf,*.otf", PROPERTY_USAGE_DEFAULT);
 	_initial_set("interface/editor/main_font_bold", "");

editor/project_manager.cpp

@@ -2371,6 +2371,8 @@ ProjectManager::ProjectManager() {
 		switch (display_scale) {
 			case 0: {
 				// Try applying a suitable display scale automatically.
+				// The code below is adapted in `editor/editor_settings.cpp` and `editor/editor_node.cpp`.
+				// Make sure to update those when modifying the code below.
 #ifdef OSX_ENABLED
 				editor_set_scale(DisplayServer::get_singleton()->screen_get_max_scale());
 #else