BindControl v0.19.3
Better BufferBind checking and error detection / notification; bugfixes and tweaks
BufferBinds: better error checking and UI feedback
BufferBinds: Add CheckIfKeySelected and checkIfWellFormed, and use them
BufferBinds: PowerPicker is ErrorControl; use that in BufferBindPane
PowerBinder: Bind string inside rearrange list; update bind string on load
Bugfix: don't crash because we didn't initialize DefaultToolTip
ErrorControls: set DefaultToolTip at init time and restore it when no errors