Bug 1195342 - Log viewer: Fix step start/end time display on mouseover

Removes the one time binding since it prevented the start/end time from
being shown on mouseover.

ui/partials/logviewer/lvLogSteps.html

@@ -13,7 +13,7 @@
           ng-mouseover="time=displayTime(step.started, step.finished)"
           ng-mouseleave="time=(step.duration !== null ? formatTime(step.duration) : 'Duration unknown')"
           class="pull-right clearfix">
-      {{::time}}
+      {{time}}
     </span>
 
     <div ng-if="(step.error_count > 0)">