Use the app with Kovan to have some transaction time and open the Dev Tools.
Go to My Wallet and select a token to toggle its lock.
Open the toggle lock tocken by opening the dialog.
After submitting the transaction on Metamask, immediately close the toggle lock dialog by clicking on the X.
Wait some time and see an error/warning in the console due to a setState invokation on an unmounted component. Optionally you can open the toggle token lock dialog and see how it automatically closes.
Closes #252.
To manually reproduce the bug:
setState
invokation on an unmounted component. Optionally you can open the toggle token lock dialog and see how it automatically closes.