Fixed setting colours of wxPGProperty

When wxPGProperty's text or background colours are modified with dedicated wxPropertyGridInterface utility functions (SetPropertyBackgroundColour, SetPropertyTextColour, SetPropertyColoursToDefault) then it is enough to redraw the property with new colours because its internal state remains unmodified and full refreshing is not necessary.

Closes #17588

interface/wx/propgrid/property.h

@@ -1664,6 +1664,10 @@ public:
             Default is wxPG_RECURSE which causes colour to be set recursively.
             Omit this flag to only set colour for the property in question
             and not any of its children.
+
+        @remarks
+        Unlike wxPropertyGridInterface::SetPropertyBackgroundColour(),
+        this does not automatically update the display.
     */
     void SetBackgroundColour( const wxColour& colour,
                               int flags = wxPG_RECURSE );
@@ -1753,8 +1757,11 @@ public:
     /**
         Sets property's label.
 
-        @remarks Properties under same parent may have same labels. However,
-                property names must still remain unique.
+        @remarks
+        - Properties under same parent may have same labels. However,
+        property names must still remain unique.
+        - Unlike wxPropertyGridInterface::SetPropertyLabel(),
+        this does not automatically update the display.
     */
     void SetLabel( const wxString& label );
 
@@ -1796,6 +1803,10 @@ public:
             Default is wxPG_RECURSE which causes colour to be set recursively.
             Omit this flag to only set colour for the property in question
             and not any of its children.
+
+        @remarks
+        Unlike wxPropertyGridInterface::SetPropertyTextColour(),
+        this does not automatically update the display.
     */
     void SetTextColour( const wxColour& colour,
                         int flags = wxPG_RECURSE );
@@ -1807,6 +1818,10 @@ public:
             Default is wxPG_RECURSE which causes colours to be set recursively.
             Omit this flag to only set colours for the property in question
             and not any of its children.
+
+        @remarks
+        Unlike wxPropertyGridInterface::SetPropertyColoursToDefault(),
+        this does not automatically update the display.
     */
     void SetDefaultColours(int flags = wxPG_RECURSE);