Fix minor compile issue on Linux

Author: wcjohns

src/InterSpecServer.cpp

@@ -964,7 +964,7 @@ std::string file_to_open_on_load( const std::string &session_token )
         const Wt::Json::Value &val = base.get( "ProxySetting" );
         if( val.type() != Wt::Json::Type::StringType )
           throw runtime_error( "ProxySetting must be a string value" );
-        config.m_proxy = val.toString();
+        config.m_proxy = val.orIfNull("");
       }
 #endif
 

target/electron/package.json

@@ -25,7 +25,7 @@
     "cmake-js": "^6.1.0"
   },
   "devDependencies": {
-    "electron": "^21.4.3",
+    "electron": "^21.4.4",
     "electron-packager": "^17.1.1",
     "node-addon-api": "^6.0.0"
   }