Manually added jobs #33
Description
People are searching for jobs on sites which we do not support and they want to track everything in f2a. This means we need "custom imports" to manually add jobs.
Details
Add a new site source called custom (we can think of an icon later). Then add a button (either in the home page or as a + sign in the sidebar) that will open a modal with a form to add the custom job. Needs to take in URL first, then make a HTTP request to try and automatically fill in the title and description. Let the user change them.