Query string url processor can't handle a colon in the value.

We should disallow it in the facet raw value.

As discussed in yesterday's hangout, this should resolve the issue in a fairly elegant way.

This will still fail. The $value in SearchApiString doesn't have the colon, but the query needs to have the colon. I have no idea how to resolve this.

if (count($active_items)) {
  $filter = $query->createConditionGroup($operator);
  foreach ($active_items as $value) {
    $filter->addCondition($this->facet->getFieldIdentifier(), $value);
  }
  $query->addConditionGroup($filter);
}

Run testbot, run.

This needed a reroll, if tests pass I'll commit this as well.

Committed.