4.5.0

• fixed bug of sort order not stable in feed item list
• in Subscriptions view added sorting of "Unread publication date"
• added preference "Fast Forward Speed" under "Playback" in settings with default value of 0.0, dialog allows setting a float number (capped between 0.0 and 10.0)
• added preference "Fallback Speed" under "Playback" in settings with default value of 0.0, dialog allows setting a float number (capped between 0.0 and 1.5)
• added new ways to manipulate play speed
• the "Skip to next episode" button
  • long-press moves to the next episode
  • by default, single tap does nothing
  • if the user customize "Fast Forward Speed" to a value greater than 0.1, it behaves in the following way:
    • single tap during play, the set speed is used to play the current audio
    • single tap again, the original play speed resumes
    • single tap not during play has no effect
• the Play button
  • by default, it behaves the same as usual
  • if the user customize "Fallback speed" to a value greater than 0.1, long-press the button during play enters the fallback mode and plays at the set fallback speed, single tap exits the fallback mode