Fixes graph in debug page re. edge types and arrows for:  `Stylesheet.prototype.style()` iterates over `Object.keys(passedStyleJson)` rather than `Style.properties`.
Fixes graph in debug page re. edge types and arrows for:  `Stylesheet.prototype.style()` iterates over `Object.keys(passedStyleJson)` rather than `Style.properties`.

Ref : Tweaks to improve style application performance #2145

cytoscape/cytoscape.js,cytoscape/cytoscape.js