Auto-populate / Pre-fill Company details

Requested in 4664368-zen

Prefill some details automatically when adding a job as we have to repeat these alot. These are the fields under job data for application email, company website, company twitter, company name, company tagline.

Start by locating the WordPress admin form for adding a job and the job-data fields for application email, company website, company Twitter, company name, and company tagline. Trace where these values are entered and stored, then verify that the requested company details are pre-filled when adding another job without preventing edits.

Written by the indexing model from the issue text.