rxfx-turing-complete: bugfixes & formatting improvements

[rexendevar]

fixed:

• tempo display was completely broken all of the time
• page load was inconsistent
• tracks were not armed correctly on page load
• none of my functions were centralized
• preroll indicator was ugly
• project list didn't update properly

I expect to have more fixes to do in the near future. Also if you know how to prevent the .vscode folder from appearing in my damn repo I'd rly appreciate it

[cfillion]

Also if you know how to prevent the .vscode folder from appearing in my damn repo I'd rly appreciate it

.git/info/exclude (https://git-scm.com/docs/gitignore), or stage only the desired files/changes with git add before committing.