When iterating through the different Monitor configurations available (only Laptop, mirror, laptop main - external extend, internal main - laptop extend, only external) for 'external only' the control panel does not show. Manually choosing this configuration in settings yields the same result.

Reproducible: Always

Steps to Reproduce:
1. Have Laptop, external Monitor connected
2. Iterate by hotkey or choose external as main monitor and only active in settings

Actual Results:  
Control panel is not visible.

Expected Results:  
Control panel is on the main screen.

System:    Host: sumomo Kernel: 4.3.2-1-ck x86_64 (64 bit) Desktop: KDE Plasma 5.4.3
           Distro: ManjaroLinux 15.12-rc1 Capella
Machine:   System: LENOVO product: 6474BA1 v: ThinkPad T400
           Mobo: LENOVO model: 6474BA1 Bios: LENOVO v: 7UET94WW (3.24 ) date: 10/17/2012
CPU:       Dual core Intel Core2 Duo P8400 (-MCP-) cache: 3072 KB 
           clock speeds: max: 2267 MHz 1: 800 MHz 2: 2267 MHz
Graphics:  Card: Intel Mobile 4 Series Integrated Graphics Controller
           Display Server: X.Org 1.17.4 driver: intel Resolution: 1920x1080@60.00hz
           GLX Renderer: Mesa DRI Mobile Intel GM45 Express GLX Version: 2.1 Mesa 11.0.6
Audio:     Card Intel 82801I (ICH9 Family) HD Audio Controller driver: snd_hda_intel Sound: ALSA v: k4.3.2-1-ck
Network:   Card-1: Intel 82567LM Gigabit Network Connection driver: e1000e
           IF: enp0s25 state: down mac: <filter>
           Card-2: Intel Ultimate N WiFi Link 5300 driver: iwlwifi
           IF: wlp3s0 state: up mac: <filter>
Drives:    HDD Total Size: 160.0GB (28.4% used) ID-1: /dev/sda model: INTEL_SSDSA2BW16 size: 160.0GB
Partition: ID-1: / size: 51G used: 43G (86%) fs: btrfs dev: /dev/sda4
           ID-2: /boot size: 1.2G used: 87M (9%) fs: btrfs dev: /dev/sda3
Sensors:   System Temperatures: cpu: 45.0C mobo: 44.0C
           Fan Speeds (in rpm): cpu: N/A fan-1: 1968
Info:      Processes: 186 Uptime: 12:22 Memory: 1543.5/7883.4MB Client: Shell (bash) inxi: 2.2.31