DOC-1562: Ported the 5.10.4 release notes to AsciiDoc (#2422)

Author: lnewson

.api-version

@@ -1 +1 @@
-5.10.3
+5.10.4

modules/ROOT/nav.adoc

@@ -275,6 +275,7 @@
 * xref:migration-from-froala.adoc[Migrating from Froala]
 * Release notes for TinyMCE 5
 ** xref:release-notes/6.0-upcoming-changes.adoc[Upcoming changes for TinyMCE 6]
+** xref:release-notes/release-notes5104.adoc[TinyMCE 5.10.4]
 ** xref:release-notes/release-notes5103.adoc[TinyMCE 5.10.3]
 ** xref:release-notes/release-notes5102.adoc[TinyMCE 5.10.2]
 ** xref:release-notes/release-notes5101.adoc[TinyMCE 5.10.1]

modules/ROOT/pages/release-notes/release-notes5104.adoc

@@ -0,0 +1,43 @@
+= TinyMCE 5.10.4
+:description: Release notes for TinyMCE 5.10.4
+:keywords: releasenotes bugfixes
+:title_nav: TinyMCE 5.10.4
+
+== Overview
+
+{productname} 5.10.4 was released for {enterpriseversion} and {cloudname} on Wednesday, May 4^th^, 2022. It includes {productname} 5.10.4 and additional changes to premium plugins. These release notes provide an overview of the changes for {productname} 5.10.4, including:
+
+* xref:accompanyingpremiumpluginchanges[Accompanying Premium Plugin changes]
+* xref:generalbugfixes[General bug fixes]
+* xref:upgradingtothelatestversionoftinymce5[Upgrading to the latest version of TinyMCE 5]
+
+include::partial$misc/releasenotes_for_stable.adoc[]
+
+[[accompanyingpremiumpluginchanges]]
+== Accompanying Premium Plugin changes
+
+The following premium plugin updates were released alongside {productname} 5.10.4.
+
+=== Spell Checker Pro 2.5.1
+
+The {productname} 5.10.4 release includes an accompanying release of the **Spell Checker Pro** premium plugin.
+
+In the previous release, **Spell Checker Pro** would change page focus incorrectly when spellchecking was triggered on multiple editors after a `scroll` event.
+
+**Spell Checker Pro** 2.5.1, which accompanies this release, corrects this so that the page focus no longer moves in this circumstance.
+
+For information on the Spell Checker Pro plugin, see: xref:plugins/premium/tinymcespellchecker.adoc[Spell Checker Pro plugin].
+
+[[generalbugfixes]]
+== General bug fixes
+
+{productname} 5.10.4 provides fixes for the following bugs:
+
+* Inline toolbars flickered when switching between editors.
+* Multiple inline toolbars were shown if focused too quickly.
+
+:enterprise: true
+
+include::partial$install/upgrading-info.adoc[]
+
+:enterprise: false