Prevent duplicate dialogs for successful update as root
Prevent duplicate dialogs for successful update as root

Fixes issue CLIENT-141

Change-Id: Idba0691d80e50042fac8b970d4351ecd19e97e26
Reviewed-on: http://gerrit.dmdirc.com/1759
Reviewed-by: Shane Mc Cormack <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@dmdirc.com>
Reviewed-by: Chris Smith <711c73f64afdce07b7e38039a96d2224209e9a6c@dmdirc.com>
Automatic-Compile: DMDirc Local Commits <fd7610eb81751244add0a62da2de7da51cfdce47@googlemail.com>

greboid/DMDirc,ShaneMcC/DMDirc-Client,greboid/DMDirc,ShaneMcC/DMDirc-Client,csmith/DMDirc,csmith/DMDirc,DMDirc/DMDirc,ShaneMcC/DMDirc-Client,greboid/DMDirc,csmith/DMDirc,csmith/DMDirc,DMDirc/DMDirc,DMDirc/DMDirc,ShaneMcC/DMDirc-Client,greboid/DMDirc,DMDirc/DMDirc