Fix up/down key navigation
Fix up/down key navigation

The behaviour of ClutterText around the initial position is still
a little bit erratic.

This commit fixes the key navigation with Up and Down arrows around
the first line of text.

djdeath/clutter-multithreaded,jigpu/clutter,collects/clutter,kerrickstaley/clutter-vala,nobled/clutter,kerrickstaley/clutter-vala,ebassi/clutter,djdeath/clutter,djdeath/clutter,heysion/clutter-clone,Distrotech/clutter,ebassi/clutter,GNOME/clutter,djdeath/clutter-multithreaded,GNOME/clutter,dlespiau/clutter,djdeath/clutter-android,Distrotech/clutter,djdeath/clutter,tardyp/clutter,rkudiyarov/clutter_osx,spatulasnout/clutter,tardyp/clutter,djdeath/clutter,djdeath/clutter,jigpu/clutter,GNOME/clutter,jigpu/clutter,Distrotech/clutter,nobled/clutter,spatulasnout/clutter,djdeath/clutter-android,heysion/clutter-clone,jigpu/clutter,ebassi/clutter,jigpu/clutter,collects/clutter,ebassi/clutter,rkudiyarov/clutter_osx,Distrotech/clutter,Distrotech/clutter,collects/clutter,dlespiau/clutter,heysion/clutter-clone,djdeath/clutter-multithreaded,tardyp/clutter,spatulasnout/clutter,rkudiyarov/clutter_osx,djdeath/clutter-android,Distrotech/clutter,heysion/clutter-clone,heysion/clutter-clone,ebassi/clutter,GNOME/clutter,collects/clutter,spatulasnout/clutter,spatulasnout/clutter,djdeath/clutter-multithreaded,collects/clutter,djdeath/clutter-android,kerrickstaley/clutter-vala,kerrickstaley/clutter-vala,djdeath/clutter-android,rkudiyarov/clutter_osx,djdeath/clutter,dlespiau/clutter,jigpu/clutter,GNOME/clutter,nobled/clutter