Job detail page improvements

• #24339 (closed) - Improve Job detail view to focus on the bottom of the job log - @filipa
• #30117 (closed) Update looks job log - @filipa
• #31397 (closed)Update entire page in realtime- @filipa
• #14664 (closed) Collapse job log into sections
• #13205 (moved) Add line numbering and permalink to each line in job log
• Use xterm.js to understand ANSI graphics / terminal emulation
• #20863 (moved) Show job in context of pipeline mini-graph (rather than stage dropdown and job list)