Pytest-tui

- Tweaked colors.
- Cleaned up CSS a bit.

- Changed to output HTML as one file, with all included CSS and JS content. This makes it portable when sharing results files.
- Removed unuse "Reruns" section. Reruns are still supported, just not broken out individually. This is more in line with how pytest treats the Reruns section anyway. Reruns are categorized P/F/S/XP/XF just as normal tests are.
- Remove duplicate 'lastline' in About section.
- Implemented dynamic inclusion/removal of section and results tabs, depending on if they have content or not.
- Added 'sticky' CSS styling to top-bar buttons. The top bar now shows up even when scrolling down long pages.
- Fixed a few persistent ANSI issues: no blue markup (was misssing CSS for \x1b94m, 'bright blue'); and non-marked-up section content.

- Revamp console-line categorization algorithm to accomodate variations in user environment more easily
- Add support for `live log` sections
- Fix multiple bugs (although several remain)

- Working/revamped HTML file output, with more modern look/feel.
- Fixed tui1 (Textual) so that it works with new internal implementation.
- Retiring tui2 (PyTermTk) for now.
- Reordered/removed some menu items in tuiconf to fit new content/choices.
- Changed output files folder to ./tui_files.

- Fixed bug where if config file existed but was empty, an exception would occur on launching HTML file.

- Added chronological results section.
- Cleaned up HTML.