Clear input file value after file is uploaded

Author: BoykoAlex

ui/app/scripts/directives.js

@@ -382,5 +382,16 @@ define(['angular', 'xregexp', 'moment'], function(angular) {
           });
         }
       };
+    })
+    .directive('clearSelectedFile', function () {
+      return {
+        restrict: 'A',
+        scope: false,
+        link: function(scope, element) {
+          element.bind('change', function() {
+            element.val(null);
+          });
+        }
+      };
     });
 });

ui/app/scripts/task/views/bulk-define-tasks.html

@@ -36,7 +36,7 @@ <h1>Bulk Define Tasks</h1>
         <label type="button" class="btn btn-default" tooltip-placement="top"
                tooltip="Select a file from local file system to import its contents into the DSL editor">
             <span class="glyphicon glyphicon-file"></span>
-            <input type="file" on-read-file="displayFileContents(contents)" style="display:none;"/>
+            <input type="file" on-read-file="displayFileContents(contents)" clear-selected-file style="display:none;"/>
             Import File
         </label>
 		<label class="btn btn-default" tooltip-placement="top"