Merge branch 'toolbar-bottom'

Fix handling of toolbars using both wxTB_HORIZONTAL and wxTB_BOTTOM (or
both wxTB_VERTICAL and wxTB_RIGHT) styles.

See https://github.com/wxWidgets/wxWidgets/pull/1840

Closes #18769.

include/wx/tbarbase.h

@@ -482,6 +482,10 @@ public:
     // return true if this is a vertical toolbar, otherwise false
     bool IsVertical() const;
 
+    // returns one of wxTB_TOP, wxTB_BOTTOM, wxTB_LEFT, wxTB_RIGHT
+    // indicating where the toolbar is placed in the associated frame
+    int GetDirection() const;
+
     // these methods allow to access tools by their index in the toolbar
     size_t GetToolsCount() const { return m_tools.GetCount(); }
     wxToolBarToolBase *GetToolByPos(int pos) { return m_tools[pos]; }