changelog updated
webui: context menus
streaming: support pause

- record to a single file on resume
tvd: delete adapters

- use map instead of vector
- locking
- delete adapter, frontent, port
webui: fix emtpy rpc error messages
webui: use context menu and dialog form
tvd: create and delete sources
record: fix file naming
v4l:patches updated
streaming: fix log message