nm-connection-editor forgets passwords for SSL keys

[Moritz]

When I launch nm-connection-editor, and edit wifi connection with "WPA & WPA2 Enterprise", and add an SSL key file and the password, then several actions can cause the password to vanish, making me re-enter it every time I want to use the connection:

 * sudo service network-manager restart
 * hibernating the computer
 * reboot

That's very annoying, and requiring me to type the password every time (where people could see it) doesn't add any security.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: network-manager-gnome 0.9.8.8-0ubuntu4.3
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
Date: Mon Sep 29 16:00:22 2014
EcryptfsInUse: Yes
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2014-04-26 (156 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
IpRoute:
 default via 10.6.4.1 dev wlan0 proto static
 10.6.4.0/22 dev wlan0 proto kernel scope link src 10.6.7.191 metric 9
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager-applet
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 14:B4:84:3D:60:BD bluetooth disconnected /org/freedesktop/NetworkManager/Devices/15
 wlan0 802-11-wireless connected /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.8.8 connected enabled enabled enabled enabled enabled