[Annotations] Deleting a parameter doesn't clear the selection

[pafonta]

Tested with the publication of ID 10.1523/JNEUROSCI.2740-15.2015.

Case 1: Annotation with at least two parameters.

Steps:

1. Click on a parameter which isn't the latest in the 'Existing parameters' panel.
2. Click on the button 'Delete'.
3. Incorrect behaviours:

a) The panels 'Parameter details' and 'Required tag categories' display the data from the parameter which was following in the list the one deleted.

b) If the button 'Save' is clicked, a partial* copy of the parameter which was following in the list the one deleted is added.

* Required tags are not copied, their default values are used.

Stack trace:

None

Case 2: Annotation with only one parameter.

1. Click on the parameter.
2. Click on the button 'Delete'.
3. The following exception is thrown.

Stack trace:

Traceback (most recent call last):
  File "/Users/fonta/repos/neurocurator/neurocurator/modParamWidgets.py", line 356, in deleteParameter
    self.refreshModelingParameters()
  File "/Users/fonta/repos/neurocurator/neurocurator/modParamWidgets.py", line 361, in refreshModelingParameters
    self.loadModelingParameter(selectedRow)
  File "/Users/fonta/repos/neurocurator/neurocurator/modParamWidgets.py", line 392, in loadModelingParameter
    self.paramModStack.currentWidget().loadModelingParameter(row)
  File "/Users/fonta/repos/neurocurator/neurocurator/paramValueWgt.py", line 113, in loadModelingParameter
    self.loadRow(self._parent.currentAnnotation.parameters[row])
IndexError: list index out of range