Specifying the covering recipe in the comparison recipe detail page was
always a bit awkward - you could only type the name, if you wanted to
actually find a recipe or look up the currently selected one's details
then you had to open another browser tab/window. To fix this, replace
the form on the comparison recipe detail page with a side-by-side
display of the covering recipe's information, along with a button that
lets you search and then select the covering recipe and at the same time
enter comments or set any of the other cover fields.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>