U4-2666 - Change the drop down for selecting an icon/thumbnail for doc/media types to display the new list of icons to choose from

Hey @Per, just wondering how this stuff affects this umbracoSetting and if we should just remove it?? This is the setting found in the umbracoSettings.config :

<!-- How Umbraco should show icons in the document type editor. Historically, the list has included all the files in
         /Umbraco/Images/Umbraco plus a CSS sprite defined in Umbraco_Client/Tree/treeIcons.css, unfortunately these 
         contain many duplicates. The DocumentTypeIconList setting allows you to favor one list over the other.
         
         Can be one of the following values:
         - ShowDuplicates       - Show duplicates in files and sprites. Historial Umbraco behaviour.
         - HideSpriteDuplicates - If a file exists on disk with the same name as one in the sprite
                                  then the file on disk overrules the one in the sprite, the 
                                  sprite icon will not be shown
         - HideFileDuplicates   - If a file exists on disk with the same name as one in the sprite
                                  then the file in the sprite overrules the one on disk, the file
                                  on disk will be shown (recommended) -->
<DocumentTypeIconList>ShowDuplicates</DocumentTypeIconList>

Have just set to in-progress so I don't forget to remove this if we can in fact do so.

Yeah, it should just be removed, since thats all handled with the icon picker dialog now

Ok cool, will get that done.