Hello! Thanks for Wapp!

When running a Wapp script in local mode on Linux, wappInt-start-browser (apparently unintentionally) opens two browsers (Chrome - set as system default, and Firefox).

I think the problem is that Chrome outputs some debug messages to stderr, and TCL's exec command treats that as an error.

I made a small change to my copy of wapp.tcl that solves the issue. I wonder if that would be applicable to other users as well?

@@ -414,7 +414,7 @@ proc wappInt-start-browser {url} {
     exec cmd /c start $url &
   } elseif {$tcl_platform(os)=="Darwin"} {
     exec open $url &
-  } elseif {[catch {exec xdg-open $url}]} {
+  } elseif {[catch {exec -ignorestderr xdg-open $url} msg opts]} {
     exec firefox $url &
   }
 }