Adopt onSpecificOptionChange

src/common/services/BufferService.ts

@@ -43,7 +43,7 @@ export class BufferService extends Disposable implements IBufferService {
     this.cols = cols;
     this.rows = rows;
     this.buffers.resize(cols, rows);
-    this.buffers.setupTabStops(this.cols);
+    // TODO: This doesn't fire when scrollback changes - add a resize event to BufferSet and forward event
     this._onResize.fire({ cols, rows });
   }