remove link text from nav file; define overrides in pages

docs/modules/ROOT/nav.adoc

@@ -1,14 +1,14 @@
-* xref:prerequisites.adoc[UI Development Prerequisites]
-* xref:set-up-project.adoc[Set up a UI Project]
-* xref:build-preview-ui.adoc[Build and Preview the UI]
-* xref:development-workflow.adoc[UI Development Workflow]
-* xref:templates.adoc[Work with the Handlebars Templates]
-* xref:add-static-files.adoc[Add Static Files]
-* xref:stylesheets.adoc[Work with the CSS Stylesheets]
- ** xref:add-fonts.adoc[Add Fonts]
-* xref:style-guide.adoc[UI Element Styles]
-** xref:inline-text-styles.adoc[Inline Text]
-** xref:admonition-styles.adoc[Admonitions]
-** xref:list-styles.adoc[Lists]
-** xref:sidebar-styles.adoc[Sidebars]
-** xref:ui-macro-styles.adoc[UI Macros]
+* xref:prerequisites.adoc[]
+* xref:set-up-project.adoc[]
+* xref:build-preview-ui.adoc[]
+* xref:development-workflow.adoc[]
+* xref:templates.adoc[]
+* xref:add-static-files.adoc[]
+* xref:stylesheets.adoc[]
+ ** xref:add-fonts.adoc[]
+* xref:style-guide.adoc[]
+ ** xref:inline-text-styles.adoc[]
+ ** xref:admonition-styles.adoc[]
+ ** xref:list-styles.adoc[]
+ ** xref:sidebar-styles.adoc[]
+ ** xref:ui-macro-styles.adoc[]

docs/modules/ROOT/pages/admonition-styles.adoc

@@ -1,4 +1,5 @@
 = Admonition Styles
+:navtitle: Admonitions
 
 An xref:antora:asciidoc:admonitions.adoc[admonition], also known as a notice, helps draw attention to content with a special label or icon.
 

docs/modules/ROOT/pages/build-preview-ui.adoc

@@ -1,4 +1,5 @@
 = Build a UI Project for Local Preview
+:navtitle: Build and Preview the UI
 
 == Build Preview Site
 

docs/modules/ROOT/pages/inline-text-styles.adoc

@@ -1,4 +1,5 @@
 = Inline Text Styles
+:navtitle: Inline Text
 :example-caption!:
 
 ////

docs/modules/ROOT/pages/list-styles.adoc

@@ -1,4 +1,5 @@
 = List Styles
+:navtitle: Lists
 
 == Ordered list numeration
 

docs/modules/ROOT/pages/sidebar-styles.adoc

@@ -1,4 +1,5 @@
 = Sidebar Styles
+:navtitle: Sidebars
 
 This page describes the in-page sidebar block styles, not the styles for the navigation sidebar.
 

docs/modules/ROOT/pages/style-guide.adoc

@@ -1,4 +1,5 @@
 = UI Element Style Guide
+:navtitle: UI Element Styles
 
 When creating a UI theme for Antora, there are certain elements in the UI that require support from the CSS to work correctly.
 This list includes elements in the shell (i.e., frame) and in the document content.

docs/modules/ROOT/pages/ui-macro-styles.adoc

@@ -1,4 +1,5 @@
 = UI Macro Styles
+:navtitle: UI Macros
 
 Asciidoctor supports xref:antora:asciidoc:ui-macros.adoc[three UI element representations] out of the box, which are made from corresponding inline UI macros.