fixed BUG-71 - size is lost from view details

options.py

@@ -89,7 +89,9 @@ class Options(PA):
             self.how_many=request.form['how_many']
             self.offset=int(request.form['offset'])
             self.grouping=request.form['grouping']
-            self.size = request.form['size']
+            # this can be null if we come from view by details
+            if request.form['size']:
+                self.size = request.form['size']
             # seems html cant do boolean, but uses strings so convert
             if request.form['folders'] == "False":
                 self.folders=False
@@ -123,6 +125,7 @@ class Options(PA):
                 pref.st_offset=self.offset
                 pref.size=self.size
                 pref.folders=self.folders
+                # DDP: does this need to save changed preferences here???
 
             db.session.add(pref)
             db.session.commit()