Improve the rendering of the prev / next links in the issue view and note the change in NEWS.

NEWS.mdtext

@@ -12,6 +12,7 @@
  - Forge-wide and per-project watch lists of starred issues (issue 589)
  - Configure a default issue template for each project (issues 212 and 540)
  - Pick default issue labels from the configured project settings (issue 556)
+ - Navigate to a preceding / following issue in the issue detail view 
  - Many new text syntaxes to auto-link revisions (see [[AutomaticLinks]], issue 569)
 
 * _Documentation wiki_:

src/IDF/templates/idf/issues/view.html

@@ -1,7 +1,7 @@
 {extends "idf/issues/base.html"}
 {block titleicon}{if $form}<form class="star" method="post" action="{url 'IDF_Views_Issue::star', array($project.shortname, $issue.id)}"><input type="image" src="{if $starred}{media '/idf/img/star.png'}{else}{media '/idf/img/star-grey.png'}{/if}" name="submit" title="{if $starred}{trans 'Remove this issue from your watch list'}{else}{trans 'Add this issue to your watch list'}{/if}" /></form> {/if}{/block}
 {block body}
-<div style="float:right;">
+<div class="issue-prev-next">
 {if $previous_issue_id}
 <a href="{url 'IDF_Views_Issue::view', array($project.shortname, $previous_issue_id)}" title="{if $closed}{trans 'Click here to view the previous closed issue'}{else}{trans 'Click here to view the previous open issue'}{/if}">Previous issue</a>
 {/if}

www/media/idf/css/style.css

@@ -273,6 +273,11 @@ div.issue-changes-timeline {
   color: #888a85;
 }
 
+div.issue-prev-next {
+  float: right;
+  margin-top: -25px;
+}
+
 div.issue-submit-info {
   background-color: #d3d7cf;
   -moz-border-radius: 3px;