Typo and increase timeout to 45s

Summary:
Observed that a few requests tend to timeout when using Flipper with flipper-server.

Increasing timeout to 45s as to be a bit more flexible.

'exec' operations don't have a timeout when not using flipper-server.

Reviewed By: antonk52

Differential Revision: D37955108

fbshipit-source-id: 5d8ef7f066d6b316e4b485b281a015794b5bd2de

desktop/flipper-frontend-core/src/client/FlipperServerClient.tsx

@@ -16,7 +16,7 @@ import {
 import ReconnectingWebSocket from 'reconnecting-websocket';
 
 const CONNECTION_TIMEOUT = 30 * 1000;
-const EXEC_TIMOUT = 30 * 1000;
+const EXEC_TIMEOUT = 45 * 1000;
 
 export enum FlipperServerState {
   CONNECTING,
@@ -144,7 +144,7 @@ export function createFlipperServerWithSocket(
                 reject(
                   new Error(`flipper-server: timeout for command '${command}'`),
                 );
-              }, EXEC_TIMOUT),
+              }, EXEC_TIMEOUT),
             });
 
             const execMessage = {