Use tab active/hover colours under non-MSW platforms too

This should have been part of 1bb4404527
but was forgotten there.

See #18406.

Closes https://github.com/wxWidgets/wxWidgets/pull/1344

src/ribbon/art_aui.cpp

@@ -472,7 +472,19 @@ void wxRibbonAUIArtProvider::DrawTab(wxDC& dc,
         wxString label = tab.page->GetLabel();
         if(!label.IsEmpty())
         {
-            dc.SetTextForeground(m_tab_label_colour);
+            if (tab.active)
+            {
+                dc.SetTextForeground(m_tab_active_label_colour);
+            }
+            else if (tab.hovered)
+            {
+                dc.SetTextForeground(m_tab_hover_label_colour);
+            }
+            else
+            {
+                dc.SetTextForeground(m_tab_label_colour);
+            }
+
             dc.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
 
             int offset = 0;