Allow users to sign out

[fmtabbara]

No description provided.

[jstuczyn]

Upon yarn build I'm getting the following error:

❯ yarn build
yarn run v1.22.10
$ next build && next export
info  - Using webpack 5. Reason: future.webpack5 option enabled https://nextjs.org/docs/messages/webpack5
Failed to compile.

./components/undelegate/NodeUndelegation.tsx:68:10
Type error: Cannot find name 'undelegationStarted'.

  66 | 
  67 |     // we haven't clicked undelegate button yet
> 68 |     if (!undelegationStarted) {
     |          ^
  69 |       return (
  70 |         <React.Fragment>
  71 |           <NodeTypeChooser nodeType={nodeType} setNodeType={setNodeType} />
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

[jstuczyn]

However, it does seem to run under yarn dev and it looks good - fix that compilation error and you're good to merge : )

[fmtabbara]

I changed this slightly as !isLoading was preventing the <Confirmation /> component from being displayed.

I see why before there was isStarted and isFinished states, but I think it's good to reduce the number of state variables where possible. This way we can achieve the same thing using one state variable.

[fmtabbara]

Same for the other components with this sort of structure.