Fix parent campaign order being reversed in campaign view

This fixes an issue in Civi 5.7 where the parent campaigns are
shown in reversed order on top of the "/campaign/:id/view" view
(after "Parent Campaign(s):").

parents is set via crmApi('CampaignTree', 'getparentids', {id: $route.current.params.id}),
which already seems to reverse the array order, so we'd reverse
to the original order in which root campaigns come last.

This was tested against Civi 4.6 and 5.7. Surprisingly, the order
was already correct in Civi 4.6. Since the crmApi('CampaignTree')
results were the same, I'm assuming the orderBy filter was simply
not applied under 4.6, which just happened to make it work. Angular
was upgraded from 1.3 to 1.5 between those releases, so it might
have been related to that.

partials/campaign_dashboard.html

@@ -5,7 +5,7 @@
          <div class="parents">
            {{ts('Parent Campaign(s)', {domain: 'de.systopia.campaign'})}} [{{numberof.parents}}]:
            <!-- parents -->
-           <a ng-repeat-start="(key, value) in parents | orderBy:'$index':true" href="#/campaign/{{value.id}}/view" ng-if="numberof.parents > 0">{{value.title}}</a> <span ng-repeat-end>&gt; </span>
+           <a ng-repeat-start="(key, value) in parents | orderBy:'$index':false" href="#/campaign/{{value.id}}/view" ng-if="numberof.parents > 0">{{value.title}}</a> <span ng-repeat-end>&gt; </span>
            <a ng-if="numberof.parents == 0">{{ts('This is a root campaign', {domain: 'de.systopia.campaign'})}}</a>
            <!-- current -->
            <a href="#/campaign/{{currentCampaign.id}}/view" class="current" ng-if="numberof.parents > 0">{{currentCampaign.title}}</a>