Implement sortable icons.

Done -

1) drag icons to move emoticons in the list
2) temporarily disable click-to-remove

To do -

1) rebuild list order.
2) save new list order.
3) change title of emoticons.
4) add 'processing, please wait' string to the right of sort switch.
Use delegate events.
Add animation effects in legal page.

Also add effects for navigation bar. But it seems jQuery UI 1.10.4 is
incompatible with jQuery 1.11.1 . Hope for future upgrades.
Minor string fix.

Use .html(str) instead of .text(str) to accomodate new line tag <br> .