Register all plugin props that we may be interested in
to _property_values, and later intercept all messages for
registered properties (not just atom_Path).
This partially reverts 208c781248
in order to fix monitoring when using punch-in/out.
This also allows to revert to Ardour 5 style MIDI exclusive
Input or Disk monitoring when not using layered-recording.
The GUI uses ::axis_view_by_control() if a controllable when
the CoreSelection contains a controllable.
CoreSelection::get_stripables() saves and looks up controllable
by PBD::ID. Panorama automation controls were previously
not found, since they are not directly owned by the route.
AutomationWatch::transport_state_change() is called at a time
when transport has just started to roll, but may not yet be rolling
(count-in, latency-preroll).
Later, after pre-roll is complete and transport starts moving,
AutomationWatch::transport_state_change() is not called again.
Thus set_in_write_pass(true); is never called, and writing
automation assumes that all changes happen while stopped.
In 'write" mode, guard points are added for each change, when
the transport is stopped.
Before this change, this happened at periodic intervals even
when rolling.
Terminology used by server and client was starting to diverge.
C++ classes ArdourStrips and ArdourGlobals classes have been
renamed to ArdourMixer and ArdourTransport respectively.
State node values for transport functionality have been simplified
and prefixed with 'transport_' to match what was done for strips.
Replace previous callback based basic client with an easier
to use object-oriented API that further abstracts the low level
details of the WebSockets Server surface messaging protocol.
All built-in web surface demos were updated to use the new API.
LWS_WITH_EXTERNAL_POLL a new optional define for libwebsocket 4.x.
Earlier versions always supported it, without the compile-time define.
This fixes support for libwesocket 2.x (Debian, Ubuntu), and 3.x.
Also for Windows, LWS_WITH_GLIB is not available.
This is a glibc-only extension, so don't bother on other platforms.
Also, according to POSIX, PTHREAD_STACK_MIN is defined in limits.h, so
include climits just to be safe.
