show values on faders (fixes bug in 55c6165)
don't move faders on click.

for one, it can mess up the value when switching to
numeric-entry. It is also rather useless and not
Fader-like (faders are not scrollbars).
Besides, "stepvalue" is way to large and causes jumps
(sometimes step-value is even negative, see
"fast lookahead limiter", "release time"
 -> some other bug)
Fix write for boolean automation.
fix LV2 default port value.
fix ladpsa default value.

because get_parameter_descriptor() is const, also wrap
default_value() in a const function.
update_steps(), properly handle integer ranges
use update_steps() instead of custom function
consistent step+page sizes for fader+spinbox
gtk interface update for controller step/page size
Process 'default_ui_config.in' when building with MSVC
CLA approved consistent fine-grained scale modifier
update interface for processor-box faders step/page

see also 4d4c20b8c
Save mute automation state.
Factor out duplicated track automation code.

Mute automation for MIDI tracks.
Clean up state tracking of raw MIDI.
Add missing namespace qualifiers.
Move EventRingBuffer to libardour.

This is not used anywhere in Evoral and is just a wrapper around the PBD
RingBuffer anyway.  Towards a (once again?) independently buildable/testable
Evoral and fewer cross-dependencies.
Trim the include tree.
Fix test runner for tests that use files.
Remove bogus test and noisy output.