Fix File List Del\Add switch problem and enable prevdiff command
tree4818936176bc50422ab70fd503960b5c22d1b006
-rw-r--r-- 3557 build.txt
drwxr-xr-x - common
drwxr-xr-x - contrib
drwxr-xr-x - ext
drwxr-xr-x - src