Feature #44: Image capture WebRTC & HTML5 FileIO

Silverlight was previously used to capture webcam pictures and upload
file attachments. HTML5 FileIO is now used for all attachment uploading
- including drag-drop support. WebRTC is used to capture webcam images -
this falls back to a Flash polyfill when WebRTC isn't supported.

Disco.Web/ClientSource/Style/Declarations.less

@@ -44,10 +44,10 @@
 
 // Status
 @StatusUnknown: @HeaderBackgroundColour;
-@StatusSuccess: #60a917;
+@StatusSuccess: @ThemeGreen;
 @StatusInformation: @ButtonColour;
-@StatusWarning: #f0a30a;
-@StatusAlert: #fa6800;
+@StatusWarning: @ThemeAmber;
+@StatusAlert: @ThemeOrange;
 @StatusError: @ButtonAlertColour;
 @StatusRemove: @ButtonAlertColour;