Ability to manage job applications

[djaiss]

We should support the entire Recruiting domain. It's about managing job applications, managing potential candidates, etc...

[djaiss]

Steps that remain to be done:

• [x] Header: put back the main navigation
• [x] Company tab: list open job openings https://github.com/officelifehq/officelife/pull/1376
• [ ] Link to help pages
• [ ] Protect the Apply page with captcha
• [x] Job opening page: Edit job opening https://github.com/officelifehq/officelife/pull/1280
• [x] Job opening page: Manage case when job fulfilled https://github.com/officelifehq/officelife/pull/1279
• [x] Job opening page: View job description
• [x] Job opening listing: view fulfilled job openings https://github.com/officelifehq/officelife/pull/1278
• [x] HR tab on dashboard: create widget to display current job openings
• [x] Home tab on dashboard: list open job openings for those who I am a sponsor of
• [x] Home tab on dashboard: list open job openings for those who I am a participant of
• [x] Candidate page: view the CV https://github.com/officelifehq/officelife/pull/1281