BUG: unable to correctly assign FX targets

[lordGoldemort]

Repro:

* Create an FX that needs targets (eg curve)
* Add a second effect to the scene that also requires a target
* There is now no way to correctly assign the correct channel to the first effect

Desired behaviour

Each effect in the chain should have an "assign" button - perhaps like the keyboard / MIDI bindings.

[willm]

Hello,

You need to select the effect from within the rack, then press the FX button in order to assign a function to a specific effect within the rack.

Kind regards,
Will