this should reduce the impact of the remaining 1px plot issue until we
track it down

non plugin specific class defs should not go into the plugin specific namespace

this range makes saturation bounds visible, useful for testing if
behavior rigs work etc.

the correct value seems to be 6389 for this gain setting etc. 2do:
double check that

though there is still a small display issue if the end of the display
buffer is hit because now only 1-2samples are associated with the pixel
and this causes the min/max and histogram displays to look odd.
shouldn’t be a big issue in real applications but worth fixing when we
inevitably refactor this whole plugin.

* Removed ChannelSelectorRegion class and appropriate instances
  since now it's redundant.

* Now ChannelSelector class contains three instances
  of TiledButtonGroupManager class (AUDIO, RECORD, PARAM).
  This managers own appropriate buttons, position it, responsible
  for all animations, fuzzy selection via dragging mouse, etc.
* Button group managers minor fixes.

Include definitions of LinearSmoothedValueAtomic's template methods in its header file (required because the explicit instantiations built in to the OE application are not visible to plugins on OS X)

* This class position buttons inside itself
  as tiles and has feature which gives
  us fuzzy button selection possibility via
  mouse drag (or SHIFT+mouse drag for deselection).