Save window positions to userconfig and make use of other configs

lib/GUI/HELPERS.pm

@@ -477,7 +477,8 @@ This functions returns nothing;
 
 opens a FileChooser dialog to select files or directories. $entry is a
 reference to the variable, where the selected path shall be stored. If $mode
-is set to "open", then only files with appropriate suffixes are displyed.
+is set to "open" or "key", then only files with appropriate suffixes are
+displyed.
 
 =back
 

lib/GUI/TCONFIG.pm

@@ -86,6 +86,11 @@ sub show_configbox {
 
    $box->add($box->{'vbox'});
 
+   # Experts warning top label
+   $label = Gtk2::Label->new();
+   $label->set_markup("<span foreground=\"red\"><b>" . _("Experts only!"). "</b></span>");
+   $box->{'vbox'}->pack_start($label, 1, 1, 8);
+
    $box->{'vbox'}->pack_start($box->{'nb'}, 1, 1, 0);
 
    $buttonbox = Gtk2::HButtonBox->new();