Change hideUnderline to hideDecorations

Also track cursor style

src/browser/Types.d.ts

@@ -172,7 +172,7 @@ interface ILinkProvider {
 interface ILink {
   range: IBufferRange;
   text: string;
-  hideUnderline?: boolean;
+  hideDecorations?: boolean;
   activate(event: MouseEvent, text: string): void;
   hover?(event: MouseEvent, text: string): void;
   leave?(event: MouseEvent, text: string): void;