* Emit signal once midnam was actually updated
* only re-read midnam if was it changed. This allows idempotent calls to
read_midnam() - from the same thread.
At session-load a synth-plugin may load a soundfont in the background
and emit midnam_update() after the synth was initialized but before the
GUI thread connects to the signal. By making the call idempotent the
GUI can call read_midnam() after connecting to the signal to catch up.
When forking regions, copying playlists or saving snapshots we do not
have a reference to the track and cannot use the track's name as basis
for the new filename like Editor::fork_region() does.
A cloned midi region's name is based on the original region name.
This prevents endless addition "name-1-1-1-1-1-1-1-1.mid", adding
to the region's basename.
The previous code was supposed to ensure VERSION and PROGRAM_VERSION
were *not* Unicode objects since though they are the correct type to
represent strings in Python 2, too many libraries have strange issues
dealing with them, and UnicodeErrors can creep in with implicit
conversions from/to Unicode objects.
But in fact it did exactly the contrary since str.decode() always
returns Unicode objects, whose type corresponds to the str class in
Python 3. Fix it so that in both Python 2 and 3 the constants are
eventually instances of str.
Do that by wrapping the packed controls box in a ScrolledWindow and
making it request the same width than the box but capped to 90% of the
screen width.
Also, when the box width exceeds the maximum value, try again with
one-letter automation buttons in case the reduced width avoids showing a
scroll bar.
The queued resize will only happen trigger a size-request when the
widget is realized, and on_size_request() calls ensure_layout().
Moreover, this over protection meant that sometimes a resize wasn't
noticed by the button containers.
