handle sr rescan and do not display too small vdi in vdi map in sr view

app/scripts/controllers/sr.coffee

@@ -25,3 +25,8 @@ angular.module('xoWebApp')
       console.log "Delete VDI #{UUID}"
       ## TODO: confirmation message. Too dangerous for now, but it works
       xoApi.call 'vdi.delete', {id: UUID}
+
+    $scope.rescanSr = (UUID) ->
+      console.log  "Rescan SR #{UUID}"
+
+      xoApi.call 'sr.scan', {id: UUID}

app/views/sr.html

@@ -87,7 +87,7 @@
     </p>
     <div class="progress">
       <div
-        ng-if="((VDI.size/SR.size)*100) > 0"
+        ng-if="((VDI.size/SR.size)*100) > 0.5"
         ng-repeat="VDI in SR.VDIs | resolve | orderBy:'name_label'"
         class="progress-bar progress-bar-vm"
         role="progressbar"
@@ -119,7 +119,7 @@
         <span class="quick-edit" tooltip="Edit disks" ng-click="srDisks.$show()">
           <i class="fa fa-edit fa-fw"> </i>
         </span>
-        <span class="quick-edit" tooltip="Rescan" ng-click="rescanSr()">
+        <span class="quick-edit" tooltip="Rescan" ng-click="rescanSr(SR.UUID)">
           <i class="fa fa-refresh fa-fw"> </i>
         </span>
       </p>