Update top toolbar buttons with new colour styles with the correct states.

bigbluebutton-client/branding/default/style/css/V2Theme.css

...-client/branding/default/style/css/assets/swf/v2_skin.fla

...-client/branding/default/style/css/assets/swf/v2_skin.swf

...ault/style/css/org/bigbluebutton/skins/PopUpButtonSkin.as

...uebutton/modules/phone/views/components/MuteMeButton.mxml

...ebutton/modules/phone/views/components/ToolbarButton.mxml

...on/modules/screenshare/view/components/ToolbarButton.mxml

.../bigbluebutton/modules/users/views/MediaItemRenderer.mxml

...luebutton/modules/videoconf/views/ToolbarPopupButton.mxml