fix: HiChart不设style.width 让CSS 100%管显示宽度

plugins/sentinel/dashboard.html

@@ -162,8 +162,7 @@
       var h = 60;
       this.canvas.width = w * this._dpr;
       this.canvas.height = h * this._dpr;
-      this.canvas.style.width = w + 'px';
-      this.canvas.style.height = h + 'px';
+      // CSS controls display size via width:100%;height:60px
       this.ctx.setTransform(this._dpr, 0, 0, this._dpr, 0, 0);
       this._draw();
     };