Dtaledesktop

Bugfixes for compatibility with the newest versions of d-tale, as well as python 3.9

A couple issues with the 'Profile' option have now been resolved.

The first issue was that this feature would crash on some platforms (notably windows) upon attempting to read the profile report html file. This has been resolved by explicitly setting the encoding to "utf-8".

A second issue was that if a profile report had already been generated, the new tab would sometimes just sit and spin. I'm not entirely sure why, but I've fixed this by having it immediately redirect to `/node/view-profile-report/{data_id}/` if a profile report already exists

Bugfixes:
- If a user attempts to save invalid python code, the frontend will now display the error. Previously it would fail silently and close the code editor.
- Exceptions are logged with a full stack trace, making it easier to debug issues.
- Code catching 'BaseException' has been fixed to now catch 'Exception' instead.