Removed edit sections link

Not enough time to commit to making edit.php work in a way that I was
happy with.
block_quickset.php
-made more color agnostic to better play with themes
-link to edit.php commented out (for use later)

edit.php
-formatted source
-some output formatting
-changed section_tostring to use the placeholder attribute (recent
browsers support) for default text

lang/en/block_quickset.php
-updated strings for edit.php controls (so they were more concise)

styles.css
-removed unecessary classes to make the CSS more color agnostic to
better play with themes
-added classes for edit.php output formatting