fix "pos" method for [nbx]

implemented iemgui "pos" method

fixed strange regression with gop scalar (or garray) having a crazy bbox because of scaling in the parent.

finally have a successful workaround for allowing cut/copy/paste/selectall/undo/redo inside an object box. The workaround allows object box editing without sending any data to Pd.  Once the box gets instantiated, the full contents are converted to FUDI and forwarded to Pd.  Seems to work so far.

oops... use binbuf_restore instead of binbuf_add to get dollargs to do the "right thing". Also fixed a debugging comment to keep it from printing garbage

got a very early working version that does _all_ object text editing (arrow keys, selection, etc.) in the GUI. (However, it still depends on g_rtext.c for doing everything else.)