DOC-3189: Refactor promotion documentation and update references to new promotions page (#3674)

* DOC-3189: Refactor promotion documentation and update references to new promotions page.

* DOC-3190: Update promotion documentation to clarify options for open source and cloud versions.

* Update modules/ROOT/partials/configuration/onboarding.adoc

* Update modules/ROOT/partials/configuration/promotion.adoc

* DOC-3131: Fix sidebar nesting issue.

Author: kemister85

modules/ROOT/nav.adoc

@@ -239,7 +239,7 @@
 ** xref:editor-important-options.adoc[Integration options]
 ** xref:editor-size-options.adoc[Size]
 ** xref:editor-save-and-submit.adoc[Save and submit]
-** xref:editor-premium-upgrade-promotion.adoc[Premium upgrade promotion]
+** xref:promotions.adoc[Promotions]
 * Interface
 ** Editor modes
 *** xref:use-tinymce-classic.adoc[Classic editing mode]

modules/ROOT/pages/editor-premium-upgrade-promotion.adoc

@@ -29,7 +29,7 @@ Editor options related to saving or submitting editor content.
 
 |
 [.lead]
-xref:editor-premium-upgrade-promotion.adoc[Premium upgrade promotion]
+xref:promotions.adoc[Promotions]
 
 Editor options related to turning the Premium promotion display off.
 

modules/ROOT/pages/initial-configuration.adoc

@@ -0,0 +1,6 @@
+= Premium upgrade promotion
+:navtitle: {productname} Premium upgrade promotion
+:description: Editor options related to turning the Premium promotion display off
+:keywords: upgrade, promotion, premium, button, lightning bolt
+
+include::partial$misc/premium-upgrade-promotion-option.adoc[]

modules/ROOT/pages/promotions.adoc

@@ -0,0 +1,21 @@
+[[onboarding]]
+== `+onboarding+`
+
+The cloud version of {productname} contains a promotion for paid features included in the 14-day trial. This promotion can be toggled on or off with the `+onboarding+` option.
+
+The promotion will automatically disappear when the trial ends.
+
+*Type:* `+Boolean+`
+
+*Default value:* `+true+` for cloud instances; otherwise `+false+`.
+
+*Possible values:* `+true+`, `+false+`
+
+.Example: using cloud `+onboarding+`
+[source,js]
+----
+tinymce.init({
+  selector: "textarea",  // change this value according to your HTML
+  onboarding: false
+});
+----

modules/ROOT/partials/configuration/onboarding.adoc

@@ -1,26 +1,19 @@
 [[promotion]]
-== `+promotion+`
+== `+promotion+`  
 
-{productname} 6.2 and later includes the `promotion` option. It controls the presentation or otherwise of a Tiny-specific promotion button.
+The open source version of {productname} contains a promotion for paid features. This promotion can be toggled on or off with the `+promotion+` option.
 
 *Type:* `+Boolean+`
 
 *Default value:* `+true+` in Community self-hosted instances; otherwise `+false+`.
 
 *Possible values:* `+true+`, `+false+`
 
-See xref:editor-premium-upgrade-promotion.adoc#premium-upgrade-promotion-defaults[Premium upgrade promotion defaults] for details.
-
-=== Example: using `+promotion+`
-
+.Example: using open source `+promotion+`
 [source,js]
 ----
 tinymce.init({
   selector: "textarea",  // change this value according to your HTML
   promotion: true
 });
-----
-
-The *Upgrade* promotion appears in the unused corner of the {productname} menu bar. Consequently it does not appear if the menu bar is disabled.
-
-NOTE: The distribution-specific defaults are not fixed. Someone running {productname} as part of a Premium plan can turn this option on. And someone running the Community distribution of {productname} as a self-hosted instance can turn this option off.
+----

modules/ROOT/partials/configuration/promotion.adoc

@@ -1,4 +1,7 @@
-[[premium-upgrade-promotion-option]]
-== Premium upgrade promotion option
+== Open source promotion
 
-include::partial$configuration/promotion.adoc[leveloffset=+1]
+include::partial$configuration/promotion.adoc[leveloffset=+1]
+
+== Cloud promotion
+
+include::partial$configuration/onboarding.adoc[leveloffset=+1]