Discord feedback

[joshwcomeau]

CyanSnow had the following feedback on Discord:

-Lighting controls to be more comfortable
 -Lock the selection line to the center
 -Alt + click to drag and move events
-Zoom hotkey, shift + scroll comes to mind as a comfy option 
- Full height if not in preview mode
- Laser speed displaying a number

Stuff I plan on fixing:

• [ ] Alt+click+drag to move events is a great idea
• [ ] Zoom hotkey possibly
• [ ] Something for laser speeds > 8

Lighting controls will be fixed by OSS instructions, I don't know that I see the benefit of locking the selection line to the center (assuming I understand it correctly), and I feel like I don't want the total height to change when toggling between modes (for folks with underpowered machines, they might toggle on/off a lot)