Adding now adds an empty string to list and starts edit for that string.
[emufront] / src / delegates /
drwxr-xr-x   ..
-rw-r--r-- 3795 comboboxdelegate.cpp
-rw-r--r-- 2146 comboboxdelegate.h
-rw-r--r-- 2550 stringlistdelegate.cpp
-rw-r--r-- 1561 stringlistdelegate.h