MprisCustomHud

• small bug fixes
• proper display name for mpris_player

• better error handling

• fix small bug
• new icon!

• fix some small bugs

• add support for multiple media players that you can cycle through
  • use the filter to effectively go back to previous behavior
  • use the preferred option to set a player that replaces other ones when it's active
• add the mpris_player variable to show the current player name in your hud

There may be new bugs though...

• fix mpris_playing being always false when rate is being 0.0 and set to >0.0 after playingstatus is set to "Playing"
• fix crash when some properties are not set by the media player

• add keybindings and commands for playback control
• small fixes

• better timer fix xD

• fix timer a little bit
• expose rate as mpris_rate variable

• support all version CustomHud v4 supports
• fix some bugs
• improve logic to update variables

• fix updating variables from every players signals

• Initial release