Start building CSS to show 'chosen' select fields correctly in dialog
Add CSS for dialog, fix width for chosen dialogs, add onOK method
Push 'chosen'-binding functionality into onLoad of dialog

Also rename class for chosen elements
Turn channel_format field to select-multiple and add options
Turn dt_format field to select-multiple and add options
Add placeholder text for channel_name field
Add placeholder text to all_string field
Turn dd_format field to select-multiple and add values
Add tab for showing shorthands

Options for startdate-range are too numerous to give in a dropdown,
so a tab detailing the shorthands will be provided
Define onShow method
Fix menu label title
Add CSS for editor contents area
Validate channel_name field and correctly set up and commit the values
Implement commit/setup methods for startdate_range and empty_newsfeed_url
Implement setup and commit for channel_format field
Add setup and commit methods for dt_format

- Fix conditional to check if @values is actually a string
- Chain trigger event after val()
- Add setup and commit
Encapsulate setup and commit methods for multiple-select fields

Push the procedures for setup and commit methods using Chosen into
functions
Shorten code for setup and commit methods for channel_format
Fix/implement setup and commit methods for remaining Chosen fields

dt_format, dd_format, sort_values
Implement setup/commit methods for all_string and encoding fields