Cannot edit Poll after creating it

[spalladino]

Sometimes it is not possible to edit the questions of a poll designed within Pollit after having created it (and before starting it). See http://pollit.instedd.org/en/polls/627/edit as an example: even if the fields appear editable, they cannot be typed in, and existing values disappear when trying to type.

[spalladino]

Issue is that during edition only numeric values can be entered in input boxes, and any text previously entered is automatically removed when the user tries to edit.