Make the modal dialogs use the header correctly.

Also broke out the element CSS into an inline style sheet for
readability, because some styles had to change for the modal dialog's
content to still scroll while always having the header in view.
More obvious graphic to indicate movable rows.

Change from icon-cog to icon-vertical-resize, which is similar to what
jQuery-UI's sortable demo uses.
Use the move cursor to indicate drag and drop.
Preserve the width of dragged rows.

http://stackoverflow.com/a/1372954/
Center the checkboxes.
Use spans for name and nick instead of inputs.

Significantly reduces the table row height.
Spread out the table a little more.
Add column widths for name and nick columns.

Spread out the table a bit more.