URL encoding issue in the Filebrowser plugin

[Tobiasz Cudnik]

Image and Link dialog are wrongly encoding URLs.

1. Click Images button and select Upload tab.
2. Select file called Test%First.jpg from local drive and send to server. (Transfer is successful).
3. Image Properties dialog is displayed. In the URL field, the file name is not URL encoded.

Result: It appears as “Test%First.jpg”. Clicking OK on the Image Dialog fails with an “Error on Page”:

The image doesn’t appear in the preview dialog.

[Alfonso Martínez de Lizarrondo]

dup of #5534. That kind of encoding must be done by the uploader script, as CKEditor doesn't know how to properly encode the data in the URL due to the lack of context.