Add option to see the log in UI

[sarthakpati]

Is your feature request related to a problem? Please describe.
Currently, the UI freezes once inference/training begins, which is not ideal for user experience.

Describe the solution you'd like
A continuously updating "tail" of the collaborator log would make this process better and provide much needed feedback to the user.

Describe alternatives you've considered
N.A.

Additional context
This is a non-trivial task and requires thought on the following points:

• The log file should not lock while read is happening on UI so that the python layer can continue to write to it
• The collaborator process should be kicked off on its own thread and its state constantly monitored, so that any reading function can be implemented
• A possible solution for "tail" function: https://stackoverflow.com/a/25823778/1228757