Breakpoint of Meta-Scrubbing

Features

• player only pre-loads metadata, if no value for duration is given (NOTE: to stop preloading completely the preload attribute must be set to none)
• progress bar scrubber is always completely visible and does not break out of layout
• use pointer cursor on progress handle / scrubber
• uniform breakpoints throughout the player
• (almost) no logging in production

Fixes

• do not show license area in info tab, if license info is missing ( param.license.url & param.license.name )
• use fixed font sizes instead of percentage based, growing ones
• some linter warnings and errors