Fix icon on some OSes

* Fixes https://github.com/lbryio/lbry-desktop/issues/2411

src/platforms/electron/createWindow.js

@@ -27,7 +27,7 @@ export default appState => {
     // If state is undefined, create window as maximized.
     width: windowState.width === undefined ? width : windowState.width,
     height: windowState.height === undefined ? height : windowState.height,
-
+    icon: 'static/img/tray/default/tray.png',
     webPreferences: {
       // Disable renderer process's webSecurity on development to enable CORS.
       webSecurity: !isDev,