Tooltip event logic implemented

# Added
- Added "tooltipElement" class to all relevant elements
- For loop which loops through all elements with this class
- Mouseover/mouseout event listeners tied to each element
- Changes tooltip text depending on element

# Updated
- Tooltips object keys updated to match tags & IDs in HTML
- Tips added for missing elements

# To-Do
- Swap out FX param tooltips depending on selected FX
- Swap out Filter resonance tooltip if using shelf filter
- Rewrite some tooltips to give better explanations