[PD] improve find function

[marius schebella]

hi,
I wonder if it would be possible to improve the find function in pd.
first thing, the popup window should automatically get the focus in the 
search field.
secondly, be able to search "in this patch" or "in all patches" and 
"include sub patches".
also be able to search for arguments, which is necessary for finding 
correlating sends and receives.
marius.