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[scopehal] azonenberg 97207d6 - MockOscilloscope: add dummy channels if we're given a scopesession with gaps in the list of channel numbers
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[scopehal] azonenberg 0c64f17 - LeCroyOscilloscope::PeekTriggerArmed: use automation variable to query trigger-arm status
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[scopehal-apps] azonenberg 0061dac - Added SMA and single 2.92mm connector icons
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[scopehal-apps] azonenberg 2e8461c - TriggerPropertiesDialog: allow external trigger to be selected as input even if CanEnableChannel returns false
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[scopehal-apps] azonenberg 6630901 - Use GetPhysicalConnector() in FilterGraphEditor, make external trigger show up