Bug fixes: null pointer exception for condition blocks, pretty input borders

* Fixed bug that threw a null pointer exception when condition block is present
  and species editor opened and okay button is pressed. Exception is not thrown
  anymore.
* Removed border from pretty inputs of breedblock (i.e. number and species name).
  Now the plural doesn't look like inputs on other blocks, so hopefully there
  should be an implicit assumption about non-editability of the textfield.