Increase in possible notes for playing on piano roll, new keyboard layout (like in popular DAWs)

[jejikeh]

Slightly changed the keyboard in the SFX editor so that it became more similar to the popular DAWs (Ableton, Garage Band, etc...)

1. Added the ability to switch between octaves on Z and X
2. Raised all the shortcuts one row higher (A, W, S, E, D, ...)
3. Increase the number of possible notes that can be played on the keyboard

[Skeptim]

The same hotkeys apply on the tracker mode of the music editor. Are they both affected? They should be consistent.

[jejikeh]

I completely forgot about it :) I'll fix it soon

[jejikeh]

I added support for playing on the second octave in SFX piano roll as well as in Music Editor. Added shortcuts to change the octave.

1. To play on 1 octave use: Z../
2. To play on 2 octave use: Q..P
3. To change octave press: shift+z or shift+x

[Skeptim]

I came across this today: #722
That could be an issue to check before merging, or in the other way, your pull request could solve it.

[jejikeh]

Since in the SFX editor you can play notes by holding the keys, the note C# is played if you release ctrl before S.

This can be fixed, but I'm afraid that the code will not be very good :\