minor adjustment to css for Find Widget.
minor cosmetic adjustment to css for Geocoder widget - Internet Explorer
was not happy with the widget height.
1. Add optional UI for Identify widget to select single dynamic layer or
all layers.

2. Add optional `Identify Here` to right-click map menu.

3. Replaced description in PopupTemplate JSON with fieldInfos array
for identified layers that do not have a template defined in the config.

4. Add formatting for attribute table in Identify Popup to it more
attractive and closer match the dbootstrap styling.

5. Close popup if IdentifyTask returns an error.
handle error when no layer is selected in drop-down list.
add max-height to list of layers.
add widths for the table columns.
widen the popup.
Merge pull request #146 from DavidSpriggs/feature/identify-widget-with-ui

Feature/identify widget with ui