Add "apply" to config window

[surrender]

When I am configuring, for eg. colors or filters through config window if i have to see changes i have to press OK. But then this closes the config button and I have to use F9 to open config again.
Having another button like "apply" would help a lot if one is playing around with settings and trying out things.

[admin]

Yes, but not possible (or rather: too much work ).