Hygiene: move imports above constants

Make the imports more consistent by moving them to always appear above
declarations.

Change-Id: Ic1b6786d5daccf71898aeab3cb0ec2b64efe80f7

src/gateway/reference.js

@@ -2,11 +2,11 @@
  * @module gateway/reference
  */
 
+import { previewTypes } from '../preview/model';
+
 const mw = mediaWiki,
 	$ = jQuery;
 
-import { previewTypes } from '../preview/model';
-
 /**
  * @return {Gateway}
  */

src/ui/settingsDialogRenderer.js

@@ -1,9 +1,9 @@
-import { createSettingsDialog } from './settingsDialog';
-
 /**
  * @module settingsDialogRenderer
  */
 
+import { createSettingsDialog } from './settingsDialog';
+
 const $ = jQuery;
 
 /**

src/ui/templates/referencePreview/referencePreview.js

@@ -2,11 +2,11 @@
  * @module referencePreview
  */
 
-const mw = mediaWiki;
-
 import { renderPopup } from '../popup/popup';
 import { escapeHTML } from '../templateUtil';
 
+const mw = mediaWiki;
+
 /**
  * @param {ext.popups.PreviewModel} model
  * @return {string} HTML string.

src/ui/thumbnail.js

@@ -1,9 +1,9 @@
-import constants from '../constants';
-
 /**
  * @module thumbnail
  */
 
+import constants from '../constants';
+
 export const SIZES = {
 	portraitImage: {
 		h: 250, // Exact height