pothos-gui: fix for EvalGraphBlock -- non critical change
pothos-gui: GraphObject uses contextMenuEvent
pothos-gui: widget size grip always visible when selected
pothos-gui: re-update block on properties cancel
pothos-gui: addSigSlotPair validate that keys exist
pothos-gui: automatic breakers for signal and slots
pothos-gui: created breaker properties panel
pothos-gui: added id edit to breaker_panel
pothos-gui: added text summary to breaker panel
pothos-gui: revert and fix action panel html escape
pothos-gui: fix context menu, must use mousePressEvent

//A display widget may accept the mouse event, and we wouldnt want to allow a context.
//To support this design expectation, dont use contextMenuEvent, use mousePressEvent.
pothos-gui: properties panel moved optional docs check
pothos-gui: try/catch for clear topology engine
pothos-gui: fix multi-select context menu
pothos-gui: add safety check for combobox edit widget
pothos-gui: work on enable/disable actions
pothos-gui: disabled color and topology engine ignore
pothos-gui: fix engine signature, only current blocks
pothos-util: EvalEnvironment shared ptr and error cache
pothos: install SplitterChannel at logger base for consumers