UI CRUD for observers

[idormenco]

Add ui for managing observers

• similar functionality as for ngos

• no bulk import for observers

• Observers table will contain columns:
  -First Name
  -Last Name
  -Email
  -Is Email verified yes/no
  -number of elections monitored
  -Actions

• row actions:
  -View (navigate to view observer)
  -Edit (navigate to edit observer)
  -Suspend/Activate account
  -Set password (add a popup for setting password with 2 fields password and confirm password)
  -Delete account

Extra style points for fixing the bug with actions and rowClick action (currently if you click in the actions menu it will execute the callback for onRowClick)

[imdeaconu]

Can I handle this, please?