Smooth some intense full screen shader

[starsapphire]

In current version, some full screen visual effects are too intense, that it is very hard to see what's happening on screen.
Unstoppable and Lightning Speed are two example of this. Since we need to concentrate viewing the map when constantly casting the two talent above, it will be tiring.
When coupled with confusion's blur they will be even worse, which will be common if you want to use lightning speed to escape from enemy when you are confused. Confusion itself is also a bit intense, so It will be happy to see itself get smoothed.
On visual designing side, those two are self-infliched beneficial effects, and there is no need to 'warn' the player about it. A moderate indication will be enough.
Also, the no_healing indication color is poison themed green. However, many other effect(e.g. unstoppable, freeze) may also cause it, and the green color may not be very suitable for the theme.