Snippets: Put the cursor in a more useful final position

Snippets: Put the cursor in a more useful final position

e.g.
for (int $var$ = 0; $var$ < $total$; ++$var$) {
$$
}

In final, we need put the cursor at the $$ position.
This makes the code easier to write.

Change-Id: Ied1e6f6bc15277dae43d3052bfb2543124afcb82
Merge-request: 2207
Reviewed-on: http://codereview.qt-project.org/6165
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>