[IMP] hr_recruitment : Improve the UX of recruitment app

addons/hr/views/hr_job_views.xml

addons/hr_recruitment/i18n/hr_recruitment.pot

addons/hr_recruitment/models/calendar.py

addons/hr_recruitment/models/hr_job.py

addons/hr_recruitment/models/hr_recruitment.py

addons/hr_recruitment/views/hr_recruitment_views.xml

...s/hr_recruitment/wizard/applicant_refuse_reason_views.xml

addons/hr_recruitment_skills/views/hr_applicant_views.xml

addons/hr_recruitment_survey/views/hr_job_views.xml

addons/website_hr_recruitment/models/hr_job.py

addons/website_hr_recruitment/views/hr_recruitment_views.xml