Controller Rack - Ability to move controller modules up and down

[sound8]

Add the ability to move controller modules in the Controller Rack up and down.

Benefits....

Allows you to organize / order them based on your setup preferences
Can allow you to separate LFO Controllers from Peak Controller modules

Solutions.....

1.) Create two context menu items "Move Up" and "Move Down"

2.) Add ability to move controller modules by dragging with mouse
(using similar code already used in SE & BBE that allows tracks to moved by mouse)
Wish this approach of moving items was used more throughout LMMS just makes workflow so much faster / easier.
I feel like I would move things so much more if it was, not for the benefit of my songs, but just because I can :)
But seriously though, can get a little tedious having to keep on opening context menus over and over if needing to move items great distances.

3.) Best of both worlds, adding both methods (I am sure I will get an argument or two for this statement) :)

Anyways, I could have sworn this already existed in the context menu?
May be just thinking of effect modules (which can also benefit from mouse drag moving).

[tresf]

Also requested in comment (2017): #2944 (comment)