Version 2.978

• Rewrite the YouTube AsyncTask implementations as methods that use RxJava - by @Isira-Seneviratne
• Implementation of play/pause external media controls - by @darksworm
• Fix freezes/slow UI updates with accessing the database in the background - by Zsombor
• Improve subscription listing with database index - by Zsombor
• Subscription refresh is not tied to opening up the subscription tab - by Zsombor
• Implement 'Trending in XYZ' tab, with country selector - by Zsombor
• Fix errors in downloaded file deletion - by Zsombor
• Fix layout issues when big fonts are used - by Zsombor
• Implement tab hiding/showing without app restart - by Zsombor
• Fix a crash on Android 4.0 - by Zsombor
• Updated translations for:
  • Basque and Spanish - by Julio Montero
  • Catalan - by Alfonso Montero López
  • Croatian - by Milo Ivir
  • Dutch - by Heimen Stoffels
  • Esperanto - by Jakub Fabijan
  • French - by Thomas Foucher
  • Japanese - by Takaki Iekura
  • Indonesian - by Reza Almanda and zmni
  • Italian - by Silvio Pastore
  • Latvian - by Darksworm
  • Hungarian - by Zsombor
  • Norwegian Bokmål - by Allan Nordhøy
  • Polish - by Michal L
  • Portuguese - by Sérgio Marques
  • Simplified Chinese - by @ohsorry
  • Traditional Chinese - by Jeff Huang
  • Turkish - by Oğuz Ersen
  • Ukrainian - by Tymofij Lytvynenko