Display the name of the agent when only one agent is available.
Prettify the tests file path.
Fix being able to save tests results when server is offline.

Also fix an event name and some internal presenter logic.
Minor fixes to guides (typos & co).
Added guidelines about Redis.
Merge remote-tracking branch 'origin/topic/bf_gui_fixes' into develop

* origin/topic/bf_gui_fixes:
  Added guidelines about Redis.
  Minor fixes to guides (typos & co).
  Fix being able to save tests results when server is offline.
  Prettify the tests file path.
  Display the name of the agent when only one agent is available.
Release version v0.2.5-rc032.