Fix too small taskdetails text area height

lib/static/view/js/tasklist.js

@@ -418,7 +418,7 @@ YUI.add('postmile-tasks-list', function (Y) {
     // manage size of details input
 
     function shrinkDetails(node) {
-        node.setStyle("height", '5px'); // nominal size for empty line
+        node.setStyle("height", '15px'); // nominal size for empty line
     }
     function expandDetails(node) {	// could do this on delete as well
         // count =  node.get('value','').split( '\n' ).length ;