Fading-out non editable content objects in edit mode

Currently our fieldset system does not allow the differenciation between editable and non editable content objects. I mean that if we have a RSS portlet and a Main_content portlet, one is editable and the other not. However there is no visual difference between both fieldsets.

We could perhaps brainstorm a bit about fading out non editable content objects (especially when inline editing is turned on). So we could let some action menu in order to modify the RSS feed but the editor would immediately see the difference from a remote or non editable content object and some editable content object.

For the moment he has to click on all objects to identify the one he can edit.

The samebehaviour could be perhaps added on a per field basis as we still have some ACL on a per field basis.