Minor fix in search oder for Tcl/Tk installations, and implement similar paths to search for in TEA_PATH_CONFIG too.

adds:
I believe this is incorrect. The tcl/tk paths should not be searched. TEA_PATH_CONFIG is for extensions, not tcl/tk. Extensions should not be putting their *Config.sh files in tcl/tk dirs. I didn't change anything here because I saw nothing needed changing; I didn't forget or omit.

Was the order changed because the order was problematic?