Fix ui6274 Picard references non-FSDG plugins repo

Correct changelog comment as per code review

Change to hiding Download Plugin button with ...setVisible(False)

Built and tested for Toutatis and Belenos

helpers/make-picard

+#!/bin/sh
+#
+#    Copyright (C) 2015 Andrew M. Lindley <andrew@andrewlindley.co.uk>
+#
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 2 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program; if not, write to the Free Software
+#    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+#
+
+VERSION=1
+
+. ./config
+
+sed '/self.plugin_download = QtGui.QPushButton(self.groupBox_2)/a\
+        self.plugin_download.setVisible(False)
+' -i picard/ui/ui_options_plugins.py
+
+changelog 'Disable Download Plugin in picard/ui/ui_options_plugins.py #6274'
+
+compile
+