Make the AES Key's readonly fields.  The buttons below them will allow re-randomizing the key.  This will ensure the key is always the right size for the encryption functions to work, as well as ensure it's something that's not easily rememberable.  To assist in getting the information when needing to recompile, the system needed a size increase of the password and text fields.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2186 71f96598-fa45-0410-b640-bcd6f8691b32
Merge svn with master