Minor update to CSS; make better use of screen (tables).
Moved checkbox to left of button label for buttons "Delete" and
"Really" and also added a newline between the buttons.
Modified the height of the text area used for editing snippets and
kickstarts to make it shorter. If user wants to make it longer, they
can extend it while editing.
Merge pull request #1067 from jmaas/release24

Some cobbler-web improvements