MNT Added 4.7.3 changelog

docs/en/04_Changelogs/4.7.3.md

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+# 4.7.3
+
+## Overview
+
+A full list of module versions included in CMS Recipe 4.7.3 is provided below. We recommend referencing recipes in your dependencies, rather than individual modules, to simplify version tracking. See [Recipes](/getting_started/).
+
+<details>
+<summary>Included module versions</summary>
+
+| Module | Version |
+| ------ | ------- |
+| silverstripe/admin | **1.7.3** |
+| silverstripe/asset-admin | 1.7.1 |
+| silverstripe/assets | 1.7.0 |
+| silverstripe/campaign-admin | 1.7.1 |
+| silverstripe/cms | 4.7.1 |
+| silverstripe/config | 1.1.0 |
+| silverstripe/errorpage | 1.7.0 |
+| silverstripe/framework | **4.7.3** |
+| silverstripe/graphql | 3.4.1 |
+| silverstripe/mimevalidator | 2.1.1 |
+| silverstripe/reports | 4.7.0 |
+| silverstripe/siteconfig | 4.7.0 |
+| silverstripe/versioned | 1.7.2 |
+| silverstripe/versioned-admin | 1.7.2 |
+
+</details>
+
+Upgrading to Recipe 4.7.3 is recommended for all sites. This upgrade can be carried out by any development team familiar with Silverstripe.
+
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+
+## Change Log
+
+
+### Bugfixes
+
+
+ * silverstripe/admin (1.7.2 -&gt; 1.7.3)
+    * 2021-02-17 [bf17ba3](https://github.com/silverstripe/silverstripe-admin/commit/bf17ba323173e5e1e5c52eca980c88a35b0768d2) Correct sizing of PopoverOptionSet, restore dismissal on blur (Garion Herman)
+
+
+
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