Fix hit table "show image" function

Author: David Stirling

cpa/classifier.py

@@ -1924,7 +1924,7 @@ def update(frac):
                 labels += [p.plate_id]#labels += ['Plate ID']
                 labels += [p.well_id]
         labels = self.getLabels(labels, nClasses, wants_enrichments=wants_enrichments)
-        key_col_indices = [i for i in range(len(labels))]
+        key_col_indices = list(range(nKeyCols))
         try:
             title = "Hit table (grouped by %s)" % (group,)
             if filter:

cpa/tableviewer.py

@@ -852,7 +852,7 @@ def on_rightclick_label(self, evt):
     def show_popup_menu(self, items, pos):
         self.popupItemById = {}
         menu = wx.Menu()
-        menu.SetTitle('Show Image')
+        menu.SetTitle('Show Image:')
         for item in items:
             id = wx.NewId()
             self.popupItemById[id] = item