Docs fixes for wxTreeCtrl and wxGrid

See #24766.

(cherry picked from commit f4d00c1082)

interface/wx/grid.h

@@ -5902,11 +5902,21 @@ public:
     */
     void SetRowAttr(int row, wxGridCellAttr* attr);
 
-
+    /**
+        Returns an array of row labels within the given region.
+    */
     wxArrayInt CalcRowLabelsExposed( const wxRegion& reg,
                                      wxGridWindow *gridWindow = NULL) const;
+
+    /**
+        Returns an array of column labels within the given region.
+    */
     wxArrayInt CalcColLabelsExposed( const wxRegion& reg,
                                      wxGridWindow *gridWindow = NULL) const;
+
+    /**
+        Returns an array of (visible) cells within the given region.
+    */
     wxGridCellCoordsArray CalcCellsExposed( const wxRegion& reg,
                                             wxGridWindow *gridWindow = NULL) const;
 

interface/wx/treectrl.h

@@ -173,17 +173,6 @@
 
     See also @ref overview_windowstyles.
 
-    @b Win32 @b notes:
-
-    wxTreeCtrl class uses the standard common treeview control under Win32
-    implemented in the system library comctl32.dll. Some versions of this
-    library are known to have bugs with handling the tree control colours: the
-    usual symptom is that the expanded items leave black (or otherwise
-    incorrectly coloured) background behind them, especially for the controls
-    using non-default background colour. The recommended solution is to upgrade
-    the comctl32.dll to a newer version: see
-    http://www.microsoft.com/downloads/details.aspx?familyid=cb2cf3a2-8025-4e8f-8511-9b476a8d35d2
-
     @library{wxcore}
     @category{ctrl}
     @appearance{treectrl}