Developer Console menus are unresponsive

Fix 1:

1. Login and open Developer Console by Chrome

2. Open Developer tools and select Network

3. Reload on Developer Console

Fix 2:

1. Login to Workbench and go to REST Explorer

2. Use the following query in Workbench to get the IDEWorkspace

/services/data/v31.0/tooling/query/?q=SELECT id, name from IDEWorkspace

ID of IDEWorkspace is "1dexxxxxxxxxxxxxx".

3. Do GET operation for the found id with following query "/services/data/v29.0/tooling/sobjects/IDEWorkspace/1de1a0000014sEWAAY"

4. You will see the content of IDEWorkspace

5. Do DELETE operation on found record.

6. Re-open Developer Console.

7. Developer Console will work fine. As we created a new workspace and the old workspace has been deleted.And the slowness will also be removed.