Insomnia: Use pkce can't be enabled

[kdankert]

Describe the bug
Using the latest early access version 2020.5.0-beta.2 it is not possible to activate pkce support in the authorization code flow. Any authentication request are done without pkce support.

To Reproduce
Steps to reproduce the behavior:

1. Create a new request
2. Add OAuth2 authentication
3. Click on use pkce
4. See error

Expected behavior
The checkbox should toggle and pkce should be used

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: macOS 10.15.7
• Installation Method: homebrew and standard produce the same error
• App Version 2020.5.0-beta.2

Additional context
Add any other context about the problem here.

Might be interesting for @DASPRiD, who implemented pkce support.

[rafaelrenanpacheco]

Since this option need to be fixed, I'll hop on this thread and suggest a reorder on the PKCE checkbox, to be like this:

The current placement seems a little odd:

Another request would be to bring the Clear OAuth 2 session to the Advanced Options. This button is only reachable from the preferences window, which difficult testing using different users. This is the button:

[simardst]

I have the exact same issue with version 2020.5.0

[simardst]

[develohpanda]

Another request would be to bring the Clear OAuth 2 session to the Advanced Options.

@rafaelrenanpacheco could you please create a separate feature request for this? We will be hot-fixing this with a minimal change but I think your requests and suggestions are valid. Thanks!