Update properties to properly filter for templates.

(cherry picked from commit d8d73cdd023253d778acf0e826b38be4046a6e1f)

editor/editor_export.cpp

@@ -1548,8 +1548,9 @@ void EditorExportPlatformPC::get_preset_features(const Ref<EditorExportPreset> &
 }
 
 void EditorExportPlatformPC::get_export_options(List<ExportOption> *r_options) {
-	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "custom_template/debug", PROPERTY_HINT_GLOBAL_FILE), ""));
-	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "custom_template/release", PROPERTY_HINT_GLOBAL_FILE), ""));
+	String ext_filter = (get_os_name() == "Windows") ? "*.exe" : "";
+	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "custom_template/debug", PROPERTY_HINT_GLOBAL_FILE, ext_filter), ""));
+	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "custom_template/release", PROPERTY_HINT_GLOBAL_FILE, ext_filter), ""));
 
 	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "binary_format/64_bits"), true));
 	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "binary_format/embed_pck"), false));