[X] Enhancement (change which improves upon an existing feature)
[ ] New feature (change which adds new functionality)
Description
Cleaning up some parts of the CSS including:
Removing *css-property workaround in layout.css that was designed to support IE 7 and older.
Making all comments sentence case
Swapping px for rem where it made sense (generally kept pixels in cases like top, left, bottom, right / height and width in some cases / border and border radius. I swapped px for rem in cases of font size and spacing. Open to going another way if people have strong opinions on this. I mainly wanted to try to get to a somewhat more consistent place with this.
Types of change
Description
Cleaning up some parts of the CSS including:
Relevant links
Fixes #309
Checklist
People to notify CC: @TheWebTech