Fix #738 - CodeSurfer animations briefly flashing

[micheleb]

The issue I reported happens because the current page index is reset before the current step is, so CodeSurfer renders the diff between its last step and the first (hence, it displays them backwards, very quickly).

The only change I had to make was inverting the two calls at lines 92-93. All the other changes were added by prettier via the pre-commit hook.

[erdemu]

Accurate description and solution. Would recommend attention to this. Maybe removing all the ide changes and only doing the reordering could be better option before a merge. This way it could be easier in the future to follow code evolution. (If you blame ideally you shouldn't see anything unrelated to the fix commit itself in the history)