Account for file deletion and renaming in Export Presets

Ensure that presets are updated with the latest files when
starting up or opening the Project Export dialog. Fixes the
error where Godot would attempt to export deleted files that
were previously selected.

(cherry picked from commit 44094b082d)

editor/editor_export.cpp

@@ -96,6 +96,19 @@ Ref<EditorExportPlatform> EditorExportPreset::get_platform() const {
 	return platform;
 }
 
+void EditorExportPreset::update_files_to_export() {
+	Vector<String> to_remove;
+	for (Set<String>::Element *E = selected_files.front(); E; E = E->next()) {
+		if (!FileAccess::exists(E->get())) {
+			to_remove.push_back(E->get());
+		}
+	}
+	for (int i = 0; i < to_remove.size(); ++i) {
+		selected_files.erase(to_remove[i]);
+	}
+	EditorExport::singleton->save_presets();
+}
+
 Vector<String> EditorExportPreset::get_files_to_export() const {
 
 	Vector<String> files;
@@ -1382,9 +1395,13 @@ void EditorExport::load_config() {
 			Vector<String> files = config->get_value(section, "export_files");
 
 			for (int i = 0; i < files.size(); i++) {
+				if (!FileAccess::exists(files[i])) {
+					preset->remove_export_file(files[i]);
+				} else {
 					preset->add_export_file(files[i]);
 				}
 			}
+		}
 
 		preset->set_include_filter(config->get_value(section, "include_filter"));
 		preset->set_exclude_filter(config->get_value(section, "exclude_filter"));

editor/editor_export.h

@@ -95,6 +95,8 @@ public:
 
 	bool has(const StringName &p_property) const { return values.has(p_property); }
 
+	void update_files_to_export();
+
 	Vector<String> get_files_to_export() const;
 
 	void add_export_file(const String &p_path);

editor/project_export.cpp

@@ -161,6 +161,7 @@ void ProjectExportDialog::_update_presets() {
 		String name = preset->get_name();
 		if (preset->is_runnable())
 			name += " (" + TTR("Runnable") + ")";
+		preset->update_files_to_export();
 		presets->add_item(name, preset->get_platform()->get_logo());
 	}