fix display of external Send UI
Merge branch 'master' of git.ardour.org:ardour/ardour
remove unused old code
NOOP - use PBD's std::string to number functions
prefer audio-fader over midi-gain fader display.

This only affects mixer-strip display (and range).
The fader has effect on all MIDI and audio data
passing though it regardless of its display mode.
prepare font-styling meter labels

decrease size and weight of midi-velocity - make '127' fit,...
include video-tools into OSX dmg
improve video-server start-up sequence

* don't wait if launching the app failed
* lower timeout and check interval
* print warnings..
use correct quoting in OS X startup script
Merge branch 'master' of git@git.ardour.org:ardour/ardour
fix video-monitor session settings

save settings when xjadeo terminates,
not only on explicit session save/quit.
handle async communication from xjadeo
properly fake/forward keyboard events from video-monitor
do not allow to change timecode-offset in xjadeo while ardour has control
move emulate_key_event() to utils
add test for writability of /usr/local/lib in OS X startup script
save and restore Generic MIDI threshold/smoothing value
Make mouse operations on grouped regions apply to pre-existing selection

On clicking on a region that is part of an active edit group with the
'selection' property enabled, its equivalent regions also become selected.
Thus, there's no need to reset the selection to the equivalent
regions when performing mouse drags on the region, and trim/fade in/fade
out/move/copy will always operate on the existing region selection if there
is one.

Fixes #5515.
vtl: fix duplicate saved settings
vtl: reduce ardour<>xjadeo communication

avoid duplcate OSD related messages.