[dialogs] Users can not do system settings after entering accounts login interface.

[freya zhang]

current build number: 158
device name: arale
channel: ubuntu-touch/rc-proposed/meizu.en
last update: 2015-11-09 04:11:21
version version: 158
version ubuntu: 20151109
version device: 20151016-0b38025
version custom: 20150925-900-8-47

Steps:
1.System settings->Accounts->Enter any account login interface，such as Evernote.
2.Drop down notification bar and select "Sound",tap "Sound settings".
3.Check the performance.

Actual result:
The UI still stay in Evernote login screen and does not enter sound system settings.
Expect result:
The UI should enter sound system settings normally ,instead of still staying in Evernote login screen.

Notes:In fact,there is no response if users stay in any account login interface then tap system setting icon in the launcher.If dismissed account login page, the settings page will be shown.

<https://wiki.ubuntu.com/SystemSettings#Navigation>: "If you externally access a System Settings panel — for example, from an indicator menu, or from an app’s permissions failure UI — any dialog that is currently open in System Settings should be cancelled so that it can navigate to the correct screen."

[Evan Wang (wsy324)]

I can reproduce it, any settings page opened from indicator is behind the account login page.

[Pat McGowan (pat-mcgowan)]

I am not sure if this is the intended behavior or not as it is a modal dialog and the user cna simply hit cancel.

[Matthew Paul Thomas (mpt)]

Specification updated. <https://wiki.ubuntu.com/SystemSettings?action=diff&rev2=81&rev1=79>