pothos-blocks: enables in block desc for port gui controls
pothos-library: support enables, other fields became optional
pothos: support optional block desc fields
pothos-blocks: use actual calls for setting num ports
pothos-library: remove enables section from DocParse.cpp
pothos-library: DocParse.cpp supports param widget specification
pothos-blocks: specify the param widget where applicable
pothos-gui: support param widget and QSpinBox
pothos-gui: keyboard shortcuts and actions for incr/decr
pothos-gui: fix incr/decr only for selected blocks
Merge branch 'port_controls'