state: Handle setting keys for the current target state
state: Handle setting keys for the current target state

Add special behaviour when you set the key of the current target state:
- If the state is transitioning, add/modify the interval so that the new
  key transitions from the current time (taking into account pre-delay) to
  its target final property
- If the state is set but has already finished animating/was warped to,
  set the property immediately

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