fix for csrfToken and project query

[svennniiii]

This fixes some bugs that prevent querying projects from overleaf (fixes #61). It is necessary due to design changes on the overleaf website. It updates the fix that was originally introduced by @itstorque.

[rayvburn]

I can only confirm that changes from this PR made it possible to query projects from the Overleaf again. Even this hack is not needed anymore. Thank your for your input!

[gfraysse]

Thank you, I can also confirm that this fixes the issue when login on the new Overleaf interface with CAPTCHA.
Minor issue I think: in my case, under Linux, the olbrowser waits until the compilation of the project is finished to end and resume the ols command. This was not the behavior before : the ols command resumed as soon as login was OK.

[rayvburn]

Did anybody have the issue with local -> remote sync not working? I've encountered that with both an older Overleaf project and a fresh one. Sync from remote to local works well.

I tried to debug that and added this:

print(f"upload file status code {r.status_code}")
print(f"upload file json        {json.loads(r.content)}")

at the end of the olclient's upload_file. The result is as follows:

upload file status code 422
upload file json        {'success': False, 'error': 'invalid_filename'}

Last time I've been using overleaf-sync with changes from this PR was 2 weeks ago and everything worked fine. I think that there were some API changes on the Overleaf side again. Could somebody confirm?

[YijunYuan]

The GCLB error happens again.