Add compatibility for Gajim 1.1

plugin_installer/manifest.ini

@@ -1,11 +1,11 @@
 [info]
 name: Plugin Installer
 short_name: plugin_installer
-version: 0.20.4
+version: 0.20.5
 description: Install and upgrade plugins from ftp
 authors: Denis Fomin <fominde@gmail.com>
  Yann Leboulanger <asterix@lagaule.org>
  Thilo Molitor <thilo@eightysoft.de>
  Philipp Hörist <philipp@hoerist.com>
 homepage: https://dev.gajim.org/gajim/gajim-plugins/wikis/PluginInstallerPlugin
-min_gajim_version: 0.16.10
+min_gajim_version: 1.0.0

plugin_installer/plugin_installer.py

@@ -55,6 +55,12 @@ except ImportError:
     from gajim.dialogs import WarningDialog, HigDialog, YesNoDialog
     from gajim.gtkgui_helpers import get_action
 
+# Since Gajim 1.1.0 _() has to be imported
+try:
+    from gajim.common.i18n import _
+except ImportError:
+    pass
+
 log = logging.getLogger('gajim.plugin_system.plugin_installer')
 
 PLUGINS_URL = 'https://ftp.gajim.org/plugins_1/'