applied Otto Wyss' patch to extend wxHelpController::KeywordSearch with mode argument (modified to the point of reimplementation)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@23450 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/html/helpctrl.cpp

@@ -319,10 +319,11 @@ bool wxHtmlHelpController::DisplayIndex()
     return success;
 }
 
-bool wxHtmlHelpController::KeywordSearch(const wxString& keyword)
+bool wxHtmlHelpController::KeywordSearch(const wxString& keyword,
+                                         wxHelpSearchMode mode)
 {
     CreateHelpWindow();
-    bool success = m_helpFrame->KeywordSearch(keyword);
+    bool success = m_helpFrame->KeywordSearch(keyword, mode);
     AddGrabIfNeeded();
     return success;
 }