Improve effects layouts.
Related to #818
This commit doesn't seem to solve the issue with LFG layout (at least on my machine), but it makes all the other effects disappear. I tried to revert to the previous commit to test and the effects show up.
For some reason the color wheels are a bit too big and on the default layout become too far apart for some reason. This at least for a FHD display.
I was testing if for some reason was only broken for old projects, and not for newly added effects, but the behaviour is even more strange. I tried with a random selection of effects, and for some reason Grain, for example, made all the effects appear. It wasn't a specific number of effects (that could show some issue with an index counter, for example), but that specific effect. Maybe the kind of effect triggers something in the algorithm to show/draw all the effects?