Infinite zoom to move forward at constant speed

[vincentfretin]

Current EditorControls mouse wheel behavior is moving forward with decreasing speed and we end up blocked. Remove that constraint and update the orbit point accordingly.

[vincentfretin]

Or move the camera with wasd.
With w to move forward, we don't really need for zoom to be infinite.
Maybe it would be better to replace EditorControls with camera-controls https://github.com/yomotsu/camera-controls it already support moving the pivot point and you can also enable wasd on it https://yomotsu.github.io/camera-controls/examples/keyboard.html
In the above camera controls example, the wasd controls doesn't move in the camera forward direction but along the grid, I find it better.
Also add e and q to move up and down.

That means we also need to disable or remap some shortcuts:

• remove d shortcut (duplicate)
• replace w (translate) to 1 (keyCode 49)
• replace e (rotate) to 2 (50)
• replace r (scale) to 3 (51)
• shift all the keys for camera shortcuts 1-7 (49-55) to 4-9,0 (52-57,48)
• replace 0 (48) toggle sidebars visibility by shift+tab (event.shiftKey && event.keyCode === 9)