Fixed missing emoji locales and minor improvement for the EmojiGrid padding.

...uebutton-client/branding/default/style/css/BBBDefault.css

bigbluebutton-client/locale/en_US/bbbResources.properties

...nt/src/org/bigbluebutton/modules/users/views/EmojiGrid.as

...bigbluebutton/modules/users/views/StatusItemRenderer.mxml

...rc/org/bigbluebutton/modules/users/views/UsersWindow.mxml