The fields cannot be edited once you have dragged and dropped a "Content" or a "Title" field

The issue appears at the second step of creating an application and it has also been reproduced on the XE 4.5 Snapshot. Basically, after adding a "Content" or a "Title" field the input elements cannot be edited anymore. The Date Picker, the drop-down list and the check-boxes are not affected.

I noticed that this only happens when the default editor is set to "Wysiwyg".