The tags UI lacks symmetry and proper padding

[mlposey]

• Symmetry:
  Each tag in the list contains the tag and trash icon. They are aligned poorly. Position the tag to be left aligned, and right align the trash icons.

• Padding:
  The tag text input consumes more vertical space than needed, creating an awkward break between the text hint and existing tags in the list view. Reduce either the padding on the input or the list view so that the two are vertically closer.