Only show next episode popup if web client setting is turned on

[cewert]

Changes

• check web client setting before showing next episode popup
• save m.user.configuration to a global var for easy access from components - m.global.userConfig
  • remove userConfig field from XML nodes that were using it

Issues

Fixes #1099

[cewert]

Instead of pushing the userConfig down to each component that needs it, I've saved it to a global var where it can be accessed easily from anywhere. This will slightly increase our apps memory usage but seems like a fair trade off for having easy access to the userConfig from any component which will come in handy for other features in the future.

As for the next episode popup, I've tested playing an episode from a TV library and also using the shuffle function to test the new video player. The next episode popup was successfully suppressed in both cases but when using shuffle play the next episode still played automatically. I believe this is a bug and should be handled in another PR Edit: tested shuffle play on web client with "auto play next ep" turned off and it played more than one episode just like the new player does