Improve the dashboard with lots of fixes and features

[pabs3]

These changes include lots of quality-of-life features and fixes:

• Document the job header and its contents
• Refer to the job header rather than stats line
• Clarify that the filter operates on job logs and is a regex
• Document the title URL parameter
• Document the host URL parameter
• Document the dumpMax URL parameter
• Document the debug URL parameter
• Add job notes to job URL title
• Document the mouseover info for the URL and queue count
• Compile the filter regex only once when filtering jobs
• Allow filtering jobs by the person who started the job
• Add identifiers for the filter modification buttons
• Add a button and key to revert to the initial filter
• Allow hiding the job headers for hidden job logs
• Add an option to specify the port for the recent logs
• Add an option to specify the URL for the logs stream
• Add a slight delay when typing into the job log filter
• Allow hiding jobs based on their status
• Fix detection of finished jobs
• Detect jobs that failed and allow filtering them out

Happy to fix or remove anything from this if needed.