stockoptions: don't try to show stocks that are undefined
stockoptions: don't try to show stocks that are undefined

Some of the resources have "name: false", and we were throwing an
exception after trying to get ucfirst on a "false" name.

Fix this by simply adding a check, and ensuring that we can show all
available stocks for adding controls.

Signed-off-by: Jacob Keller <74ec1f46a68d238888726a00aa611ba6343172e2@gmail.com>

oliversalzburg/cbc-kitten-scientists,rdancer/cbc-kitten-scientists,oliversalzburg/cbc-kitten-scientists,oliversalzburg/cbc-kitten-scientists,cameroncondry/cbc-kitten-scientists