Wave loader not scaling perfectly

[soumak77]

The wave loader does not scale properly. The spacing is off when the wave is small. The SCSS math needs to be updated so the wave looks correct for all sizes. The issues seem to do with fractional pixels.

[soumak77]

Currently the wave loader has 5 boxes for all sizes. Instead if this was switched to 4 boxes for smaller sizes, it might resolve the issue with fractional pixels. To allow keeping the same HTML structure for the loader, the 5th box can be hidden via CSS instead of removing it from the HTML.