added auto save in new/delete connection and modify/delete node

.vscode/launch.json

@@ -11,7 +11,7 @@
             "url": "http://localhost:4200/",
             "port": 9223,
             "sourceMaps": true,
-            "trace": true,
+            "trace": true,  
             "webRoot": "${workspaceRoot}",
             "runtimeArgs": [
                 "--disable-session-crashed-bubble",

build/config.gypi

@@ -0,0 +1,80 @@
+# Do not edit. File was generated by node-gyp's "configure" step
+{
+  "target_defaults": {
+    "cflags": [],
+    "default_configuration": "Release",
+    "defines": [],
+    "include_dirs": [],
+    "libraries": [],
+    "msbuild_toolset": "v141",
+    "msvs_windows_target_platform_version": "10.0.17763.0"
+  },
+  "variables": {
+    "asan": 0,
+    "build_v8_with_gn": "false",
+    "coverage": "false",
+    "debug_nghttp2": "false",
+    "enable_lto": "false",
+    "enable_pgo_generate": "false",
+    "enable_pgo_use": "false",
+    "force_dynamic_crt": 0,
+    "host_arch": "x64",
+    "icu_data_in": "..\\..\\deps/icu-small\\source/data/in\\icudt64l.dat",
+    "icu_endianness": "l",
+    "icu_gyp_path": "tools/icu/icu-generic.gyp",
+    "icu_locales": "en,root",
+    "icu_path": "deps/icu-small",
+    "icu_small": "true",
+    "icu_ver_major": "64",
+    "is_debug": 0,
+    "napi_build_version": "5",
+    "nasm_version": "2.14",
+    "node_byteorder": "little",
+    "node_code_cache": "yes",
+    "node_debug_lib": "false",
+    "node_enable_d8": "false",
+    "node_install_npm": "true",
+    "node_module_version": 72,
+    "node_no_browser_globals": "false",
+    "node_prefix": "/usr/local",
+    "node_release_urlbase": "https://nodejs.org/download/release/",
+    "node_report": "true",
+    "node_shared": "false",
+    "node_shared_cares": "false",
+    "node_shared_http_parser": "false",
+    "node_shared_libuv": "false",
+    "node_shared_nghttp2": "false",
+    "node_shared_openssl": "false",
+    "node_shared_zlib": "false",
+    "node_tag": "",
+    "node_target_type": "executable",
+    "node_use_bundled_v8": "true",
+    "node_use_dtrace": "false",
+    "node_use_etw": "true",
+    "node_use_large_pages": "false",
+    "node_use_large_pages_script_lld": "false",
+    "node_use_node_snapshot": "true",
+    "node_use_openssl": "true",
+    "node_use_v8_platform": "true",
+    "node_with_ltcg": "true",
+    "node_without_node_options": "false",
+    "openssl_fips": "",
+    "openssl_is_fips": "false",
+    "shlib_suffix": "so.72",
+    "target_arch": "ia32",
+    "v8_enable_gdbjit": 0,
+    "v8_enable_i18n_support": 1,
+    "v8_enable_inspector": 1,
+    "v8_no_strict_aliasing": 1,
+    "v8_optimized_debug": 1,
+    "v8_promise_internal_field_count": 1,
+    "v8_random_seed": 0,
+    "v8_trace_maps": 0,
+    "v8_use_siphash": 1,
+    "v8_use_snapshot": 1,
+    "want_separate_host_toolset": 0,
+    "nodedir": "C:\\Users\\NF\\AppData\\Local\\node-gyp\\Cache\\12.12.0",
+    "standalone_static_library": 1,
+    "msbuild_path": "C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\BuildTools\\MSBuild\\15.0\\Bin\\MSBuild.exe"
+  }
+}