replaced all occurences of wxColourDatabase::FindColour() with Find(); minor code cleanup here and there

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@24231 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/x11/colour.h

@@ -53,6 +53,9 @@ public:
     wxColour( const wxChar *colourName ) { InitFromName( wxString(colourName) ); }
 #endif
 
+    // Get colour from name or wxNullColour
+    static wxColour CreateByName(const wxString& name);
+
     wxColour( const wxColour& col ) { Ref(col); }
     wxColour& operator = ( const wxColour& col ) { Ref(col); return *this; }