reverted 0.43 backport as its implementation seems unstable when trying to (re)connect to jack via audio properties. Fixed a bug where closing jack while having DAC on would hang pd.

backported audio driver support from 0.43 and the pd/extra folder with supporting fixes/merges where needed. Removed outdated expr-help file in favor of new documentation.

*creating abstractions from menu does not dirty the canvas
*add minimum and currentvalue in addition to maximum of the signal magicglass
*first tests in improving consistency of fonts between vanilla and iemgui objects (in progress)

*Base path (for open/save dialog) is now updated when opening file from the command line to the directory of the file being opened