Move private properties below public ones in cr-searchable-dropdown

BUG=None

Change-Id: I3ffb028e0f657cf986eca367be40f621a1d02c83
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1824718Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Commit-Queue: Anand Mistry <amistry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700010}

ui/webui/resources/cr_elements/cr_searchable_drop_down/cr_searchable_drop_down.js

@@ -55,9 +55,6 @@ Polymer({
       notify: true,
     },
 
-    /** @private {string} */
-    searchTerm_: String,
-
     /** @type {string} */
     label: {
       type: String,
@@ -67,14 +64,17 @@ Polymer({
     /** @type {boolean} */
     updateValueOnInput: Boolean,
 
-    /** @private {boolean} */
-    dropdownRefitPending_: Boolean,
-
     /** @private {boolean} */
     showLoading: {
       type: Boolean,
       value: false,
     },
+
+    /** @private {string} */
+    searchTerm_: String,
+
+    /** @private {boolean} */
+    dropdownRefitPending_: Boolean,
   },
 
   listeners: {