v2.51.rc4

• SUP-9515 - Some entries won't play in full screen when source selector is enabled
• SUP-7353 - The number of playlist's videos is incorrect (rule-based)
• SUP-9829 - Resignation Media - WebKitPlaysInline incorrect flag
• FEC-5132 - Enable ID3 tags plugin in DVR & related
• Reset closedCaptions UI state on media change
• Support pipe-lining protocol across embed requests