0.7.9-rev3

• Player: Only send timeline events if playstate has changed or we haven't sent one for 15 seconds; fixes #137
• AddonSettings: Fix default cert bundle setting
• Core/plexnet/http: Fix session cert bundle usage by using the correct attribute (verify vs cert); should fix kodi 18 connectivity
• Core/AddonSettings: Adjust proper defaults for plextv timeouts
• Core/Networking/MyPlex: Don't use custom certificate for plex.tv connections
• Core/SSL: Replace default plex.direct certificate with ACME root bundle (Letsencrypt, ZeroSSL), valid until 2035
• Core/AddonSettings: Adjust default plex.tv timeouts to 1s (connect), 2s (read)
• Core/KodiGUI: When broken template is detected, make sure to stop current playback as well