Move `getCurrentMedia` in Editor

src/css_composer/index.js

@@ -282,7 +282,7 @@ module.exports = () => {
        */
       setIdStyle(name, style = {}, opts = {}) {
         const state = opts.state || '';
-        const media = opts.mediaText || this._getCurrentMedia();
+        const media = opts.mediaText || em.getCurrentMedia();
         const sm = em.get('SelectorManager');
         const selector = sm.add({ name, type: Selector.TYPE_ID });
         const rule = this.add(selector, state, media);
@@ -300,13 +300,5 @@ module.exports = () => {
         return rulesView.render().el;
       },
 
-
-      _getCurrentMedia() {
-        const config = em.get('Config');
-        const device = em.getDeviceModel();
-        const condition = config.mediaCondition;
-        const width = device && device.get('widthMedia');
-        return device && width ? `(${condition}: ${width})` : '';
-      },
     };
 };

src/editor/model/Editor.js

@@ -614,6 +614,20 @@ module.exports = Backbone.Model.extend({
     w.getSelection().removeAllRanges();
   },
 
+
+  /**
+   * Get current media text
+   * @return {string}
+   */
+  getCurrentMedia() {
+    const config = this.config;
+    const device = this.getDeviceModel();
+    const condition = config.mediaCondition;
+    const width = device && device.get('widthMedia');
+    return device && width ? `(${condition}: ${width})` : '';
+  },
+
+
   /**
    * Set/get data from the HTMLElement
    * @param  {HTMLElement} el