Contacts settings/SIM contacts page will close soon with two columns mode

[Evan Wang]

$ system-image-cli -i
current build number: 122
device name: mako
channel: ubuntu-touch/rc-proposed/ubuntu-pd
last update: 1970-01-01 00:48:21
version version: 122
version ubuntu: 20160127
version device: 20160112
version custom: 20150929-2-vivid

Steps to reproduce:

1. Enable windowed mode by connecting BT mouse
2. Connect to external monitor

Scenario 1:
1. Launch contacts app, switch to maximized window and it displays in two columns mode
2. Choose 'Import from SIM' from settings
3. SIM contacts page appears in the right column, but will disappear soon

Scenario 2:
1. Launch Contacts app with original window
2. Open Settings page
3. Switch to maximized window, Settings page shows in the right column, and will disappear soon