Add page highlighting to wxRibbonBar.

Allow visually highlighting a page to make it more noticeable to the user.

Closes #14527.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72347 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/ribbon/bar.h

@@ -82,6 +82,7 @@ public:
     int minimum_width;
     bool active;
     bool hovered;
+    bool highlight;
     bool shown;
 };
 
@@ -127,6 +128,10 @@ public:
     void ShowPage(size_t page, bool show = true);
     void HidePage(size_t page) { ShowPage(page, false); }
 
+    bool IsPageHighlighted(size_t page) const;
+    void AddPageHighlight(size_t page, bool highlight = true);
+    void RemovePageHighlight(size_t page) { AddPageHighlight(page, false); }
+
     void ShowPanels(bool show = true);
     void HidePanels() { ShowPanels(false); }
     bool ArePanelsShown() const { return m_arePanelsShown; }