riched20: Call OnTxInPlaceActivate() from the host.

dlls/riched20/txthost.c

@@ -1021,7 +1021,7 @@ static LRESULT RichEditWndProc_common( HWND hwnd, UINT msg, WPARAM wparam,
         LONG codepage = unicode ? CP_UNICODE : CP_ACP;
         int len;
 
-        ITextServices_OnTxPropertyBitsChange( host->text_srv, TXTBIT_CLIENTRECTCHANGE, 0 );
+        ITextServices_OnTxInPlaceActivate( host->text_srv, NULL );
 
         if (lparam)
         {

dlls/riched20/txtsrv.c

@@ -220,6 +220,7 @@ static HRESULT update_client_rect( struct text_services *services, const RECT *c
 
     if (!client)
     {
+        if (!services->editor->in_place_active) return E_INVALIDARG;
         hr = ITextHost_TxGetClientRect( services->host, &rect );
         client = ▭
     }