Disable the tinymce image plugin.
Remove unneeded comma.
In the Replace Image browser only show images.
When in “Replace Image” mode if the image to be replaced is an attachment, select it.
Cleanup the mouseup handler to remove code duplication, tighten up whitespace, and remove unnecessary comemnts.
Change how the openin gof the image details modal is triggered.

* Don’t rely on data-mce-selected which is not added in IE.
* Switch to using mousedown so that our handler fires before the tinymce code that handles creating a selection.
Adjust the look-and-feel a bit.

* Remove space above the image.
* Drop the disabled url input below the image.
Improve the handling of linkUrl

* Don’t focus the input when rendering the ImageDetails view. Unfortunately, this requires a bit of hack if we are going to reuse the Settings.AttachmentDisplay view.
* Set the proper link type when dealing with external images
* Set a more appropriate default
No neeed for these options to be set/passed here.