Set the selection mode to ExtendedSelection instead of MultiSelection.
[emufront] / src /
drwxr-xr-x   ..
drwxr-xr-x - dataobjects
drwxr-xr-x - db
drwxr-xr-x - dialogs
-rw-r--r-- 3828 emufront.pro
-rw-r--r-- 10183 emulauncher.cpp
-rw-r--r-- 2068 emulauncher.h
drwxr-xr-x - exceptions
-rw-r--r-- 1819 main.cpp
-rw-r--r-- 6834 mainwindow.cpp
-rw-r--r-- 2358 mainwindow.h
drwxr-xr-x - utils
drwxr-xr-x - widgets