[WebUI] Add Results section

[kvndrsslr]

• Need to add a results section
• Display error messages from the backend here
• Move the Logs Button here
• (Optionally) Keep a history of all runs
  • here, instead of updating the results section on each run, we would just add a new "run" <div> to the section so that the user can have an overview of all the runs that she did
  • the runs could be numbered from "Run 1" to "Run N"...

[pskLana]

@kvndrsslr, optional part is not implemented and needs to be discussed later.

[kvndrsslr]

More tasks:

• Please remove the alert window on status errors
• display status errors also in the results pane
• remove the "no errors" text from results pane on page load (maybe show it only after a run has been submitted)

Possible status:

• -1: Request ID not found (this should never happen for frontend)
• 0: request is being processed (this means you need to wait for results still)
• 1: request completed exceptionally (this needs to be displayed as error in results pane)
• 2: request successful (this is the indicator that the run is completed and we can poll the results)