Bug 1379899

Description of problem:
Backintime provides two ways to run as root in Fedora (A. from a gnome icon or B. with sudo -i). Neither works out-of-the-box in the documented ways. 

Version-Release number of selected component (if applicable):
1.1.12 

How reproducible:
Reliably

Steps to Reproduce:
A:
1. Click on backintime(root) icon

B:
1. Include user in group wheel (which, by the way, should be documented in the man page)
2. sudo -i backintime


Actual results:
A: Absolutely nothing happens (I assume backintime attempts to open a permissions dialog, but for some reason - probably the same as below - is unable to)

B: "Sorry, user rim is not allowed to execute '/bin/bash -c backintime' as root on bobslin."

This is despite rim being a member of group wheel, and wheel having full sudo permissions; rim is able to run most sudo commands successfully. There appear to be relevant messages in the logs:
Sep 28 11:52:30 bobslin audit[20415]: USER_CMD pid=20415 uid=1000 auid=1000 ses=3 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 msg='cwd="/home/rim" cmd=2F62696E2F62617368202D63206261636B696E74696D65 terminal=pts/0 res=failed'
Sep 28 11:52:30 bobslin sudo[20415]:      rim : command not allowed ; TTY=pts/0 ; PWD=/home/rim ; USER=root ; COMMAND=/bin/bash -c backintime

 but I can't figure out what they mean. The sealert browser does not show any alerts.


Expected results: 
Ideally: these mechanisms should be supported (since backing up the root filesystem as part of a backup is a reasonable use case), even if it's necessary to include warnings about security (I'm trying to create an encrypted backup with a strong password on a secured system with only a single user, so the security risks are relatively low)
Worst case: the documentation of ways to get root backups, that do not in fact work as described, should be removed. If there _is_ any way to get a working root backup, including required selinux or other security jiggery-pokery, it should be documented.

Additional info:
This is a new install of fedora 24;