Added missing descriptions for widgets

workflows/perfeval/db/package_data.json

@@ -35,7 +35,7 @@
       "interactive": false, 
       "has_progress_bar": false, 
       "order": 1, 
-      "description": ""
+      "description": "Aggregates results of the detection of noisy instances in data"
     }
   }, 
   {
@@ -494,7 +494,7 @@
       "interactive": false, 
       "has_progress_bar": false, 
       "order": 1, 
-      "description": ""
+      "description": "VIPER: performance evaluation in the Precision-Recall (PR) space. An interactive widget showing the PR plot , which can also be saved as an image or printed."
     }
   }, 
   {

workflows/perfeval/package_data/widgets/17cf3814-1edd-4c0c-84dd-e1198c033584.json

@@ -10,7 +10,7 @@
       "interaction_view": "", 
       "has_progress_bar": false, 
       "image": "images/aggregate-icon.png", 
-      "description": "", 
+      "description": "Aggregates results of the detection of noisy instances in data",
       "static_image": "", 
       "action": "aggr_results", 
       "visualization_view": "", 

workflows/perfeval/package_data/widgets/4098a678-2d14-4cbe-808d-2d150a7c2341.json

@@ -10,7 +10,7 @@
       "interaction_view": "", 
       "has_progress_bar": false, 
       "image": "images/viper600-60_1.png", 
-      "description": "", 
+      "description": "VIPER: performance evaluation in the Precision-Recall (PR) space. An interactive widget showing the PR plot , which can also be saved as an image or printed.",
       "static_image": "", 
       "action": "pr_space", 
       "visualization_view": "pr_space_view", 

workflows/weka/db/package_data.json

@@ -2352,7 +2352,7 @@
       "interactive": false, 
       "has_progress_bar": false, 
       "order": 1, 
-      "description": ""
+      "description": "Prints a WEKA decision tree. It outputs the textual representation of the tree."
     }
   }, 
   {

workflows/weka/package_data/widgets/bc3756b6-7f76-48ed-ae71-8bdae8870b23.json

@@ -10,7 +10,7 @@
       "interaction_view": "", 
       "has_progress_bar": false, 
       "image": "", 
-      "description": "", 
+      "description": "Prints a WEKA decision tree. It outputs the textual representation of the tree.",
       "static_image": "WEKA_printTree.png", 
       "action": "call_webservice", 
       "visualization_view": "",