This fixes two bugs with the current Potentiometer_Bourns_PTV09A-1_Single_Vertical footprint:
- mounting holes were 2.0mm diameter, component will not fit these holes. enlarged to 2.2mm (datasheets has a 1.8x2.2mm rectangle)
- F.Fab layer had a circle corresponding to the potentiometer shaft. This is now moved to be in line with the mountingholes. Could be relevant for e.g. front-panel design where we want to know where the pot. shaft is.
(note the horizontal version Potentiometer_Bourns_PTV09A-2_Single_Horizontal already has 2.2mm mounting holes)