Move the button so that it appears in the Winners tab of the
budget_investments index.
When the budget is in "Balloting projects", "Reviewing Ballots"
or "Finished budget" phases, the button will appear as a button
(clickable). If there are no winners calculated yet, the text
will be "Calculate winner investments"; if there are, the text
will be "Recalculate winner investments".
If the budget is in another phase, the button will be
disabled and a message will appear: 'The budget has to stay on
phase "Balloting projects", "Reviewing Ballots" or
"Finished budget" in order to calculate winners projects'
Why:
The Admin Budget form has a submit button for saving the record, adding
another submit input to destroy the record actually adds to the html:
`<input type="hidden" name="_method" value="delete">` and it collides
with the save button, forcing it to perform a destroy instead of save.
Previously the destroy button was not in the same div as the save button
How:
Just changing the Destroy from a button_to to a link_to.
