fixup! toolbox:ignore some styles to have consistent rendering

dream/platform/src/toolbox/toolbox.js

@@ -62,7 +62,7 @@
           }
           Object.keys(_class.css || {}).forEach(function (k) {
             // some styles are ignored here, to keep the rendering of toolbox consistent.
-            if (k != "line-height") {
+            if (k !== "line-height") {
               tool.style[k] = _class.css[k];
             }
           });