[CWB] Change different frequency lists or corpus for keywords generation

[D. Yuan]

Hi Andrew,

At the keyword interface, the drop-down menu of  both `select frequency 
list 1' and `select frequency list 2' are identical, showing only two 
items: choose a sub-corpus and the corpus itself.  In my understanding,  
the configuration does not allow for the use of  other corpora as 
references and the comparison of two frequency lists generated from two 
different corpora beforehand.

Could you kindly have look a into this? Thanks a lot.

Best regards,

D.