Fix Nav item padding

[thansidwell]

On the navigation on the nav items,

1. The top padding is much more than the bottom padding.
   
   Fix the padding so the bottom padding matches the top. It appears to be from some contraint around the icons.
   

2. The top padding on the text is larger than the bottom as well.
   
   Fix the padding padding so it matches the top.

3. The space between the icon and text is too large, about 14px.
   
   Reduced to about 4px so it looks like this.
   
   There appears to be some CSS like gap and margin-right that is creating it.