Add \newsince{2.7.0} to GetAsString and Set(wxString&)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39363 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/colour.tex

@@ -118,6 +118,7 @@ the colour as  \texttt{``\#"} followed by 6 hexadecimal digits
 
 This function never fails and always returns a non-empty string.
 
+\newsince{2.7.0}
 
 \membersection{wxColour::GetPixel}\label{wxcolourgetpixel}
 
@@ -173,6 +174,8 @@ Accepts colour names (those listed in \helpref{wxTheColourDatabase}{wxcolourdata
 
 Returns \true if the conversion was successful, \false otherwise.
 
+\newsince{2.7.0}
+
 
 \membersection{wxColour::operator $=$}\label{wxcolourassign}