When button is pressed or triggered by shortcut, it opens same
window as before.
User can click small arrow next to button and it open menu with all
new actions e.g. Set/Add/Remove for RTP Player.
Documentation updated.
Changes:
- Added description of playlist idea and related operations
- Added description of RTP Player dialog
- Added description of VoIP Calls dialog
- Added description of Flow Graph dialog
- Added help link to Flow Graph dialog
- Added description of RTP Streams window
- Added description of RTP Stream Analysis window
- Updated related past images