Boolean parameters to the External program executor can't be selected with the link

[Nicklas Nordborg]

1. Create a configuration for the External program executor plug-in. It doesn't matter which export and import plug-in that is selected. Make sure that a boolean parameter is defined in the last step.
2. Now, go to an experiment and start a new job configuration. Select the configuration created in the first step. Select the boolean program parameter.
3. The gui will display radio buttons with the true and false linked. Clicking directly on the radio buttons work, but the links doesn't. Firefox logs the following javascript error:

Error: document.forms.configure.value_external is undefined
Source File: javascript:document.forms['configure'].value_external.b1[1].click()
Line: 1

The issue here is that the program executor gives the boolean parameter the name 'external.b1'.

[Nicklas Nordborg]

(In [5396]) Fixes #1501: Boolean parameters to the External program executor can't be selected with the link