Fix: Parameteres appear without order in list views.
Communication show send date.
Show number of communications used for this questionnaire and the last communication date.
Add dates for state changes.

Add following dates and parameters:
par_encuestador
last_communication_date
num_communications
date_draft
date_in_process
date_waiting
date_rejected
date_complete
date_validated
date_in_coding
date_cancelled
Estrati Statics show new totals for ver and muestra.
New button to open Estrato Statics from Surveys.
Fix: Import questionnaires not import parameter names in lowercases.
Fix: Error If column version is not set.
View Refactory.