1. Add arrows to edit dropdowns
2. Adjust lightened fields so they don't look like input boxes, and fix
rgba colours
3. Add ability to click file names to edit
4. Add feedback when edit button is hovered
5. Add feedback if a file has been opened for editing and shut again
(saved changes, unsaved changes, unchanged)
6. Add ability to open and close all files to edit them all at once
7. Add overall feedback for file uploads, and fix NaN error
8. Fix up area to match design
9. Fix error messages so they fit in the provided space
10. Fix case where a single uploaded file errors
http://open.silverstripe.org/ticket/7046
UploadField would default to one folder only, and wouldn't allow asset
tree traversal. HtmlEditorField MediaForm has this capability, so added
it here in a similar fashion via TreeDropdownField.
UploadField was relying entirely on the File::get_class_for_file_extension to
select a class, so it could only create File or Image objects. This
would break the relationships based on derived objects. Also make it
respect the FileField::relationAutoSetting.
API CHANGE Removed several unsed JavaScript globals: sprintf(), Number.prototype.CURRENCIES, Number.prototype.toCurrency(), String.prototype.ucfirst(), jQuery.fn.clearFields(), jQuery.fn.clearInputs()
MINOR Removed prototype_improvements.js and jquery_improvements.js files, now contained in individual component code (or removed altogether)
