Let user decide which channel to read all data points from

SQL queries:

ALTER TABLE Channels ADD COLUMN readAllPoints INTEGER DEFAULT 0;
UPDATE Channels SET readAllPoints=1 WHERE dataType='RT130' AND channel NOT IN ('SEISMIC', 'MassPos?');

Update minimum version of PySide6 to 6.7 to head off QCheckBox's replacement of stateChanged (depracated in 6.9) with checkStateChanged (introduced in 6.7).

Add a checkbox column to the Channels table which determine whether a channel should have all its data points read. Disabled for RT130 channels because we already read all data points from most of them, and disabled for waveform channels because they have too much data.

Closes #292 (closed)