[GTK3] Fix GObject deprecation warnings

GObject.idle_add is deprecated using GLib.idle_add instead
GObject.timeout_add is deprecated using GLib.timeout_add instead
GObject.SIGNAL_RUN_LAST is deprecated; use GObject.SignalFlags.RUN_LAST instead
GObject.GError is deprecated; use GLib.GError instead
GObject.timeout_add is deprecated use GLib.timeout_add instead.
ListStore(str, str) using unicode_literals get_value return utf8.

deluge/ui/gtk3/common.py

@@ -18,7 +18,7 @@ import sys
 import six.moves.cPickle as pickle
 from gi.repository.Gdk import SELECTION_CLIPBOARD
 from gi.repository.GdkPixbuf import Colorspace, Pixbuf
-from gi.repository.GObject import GError
+from gi.repository.GLib import GError
 from gi.repository.Gtk import (
     Clipboard,
     IconTheme,

deluge/ui/gtk3/listview.py

@@ -13,7 +13,7 @@ import logging
 
 from gi.repository import GObject, Gtk
 from gi.repository.Gdk import Event  # pylint: disable=ungrouped-imports
-from gi.repository.GObject import SIGNAL_RUN_LAST, TYPE_NONE, signal_new
+from gi.repository.GObject import TYPE_NONE, SignalFlags, signal_new
 
 from deluge.common import decode_bytes
 
@@ -21,7 +21,7 @@ from .common import load_pickled_state_file, save_pickled_state_file
 
 # FIXME: ?
 signal_new(
-    'button-press-event', Gtk.TreeViewColumn, SIGNAL_RUN_LAST, TYPE_NONE, (Event,)
+    'button-press-event', Gtk.TreeViewColumn, SignalFlags.RUN_LAST, TYPE_NONE, (Event,)
 )
 
 log = logging.getLogger(__name__)

deluge/ui/gtk3/queuedtorrents.py

@@ -12,7 +12,7 @@ from __future__ import unicode_literals
 import logging
 import os.path
 
-from gi.repository.GObject import timeout_add
+from gi.repository.GLib import timeout_add
 from gi.repository.Gtk import (
     STOCK_SORT_DESCENDING,
     Builder,

deluge/ui/gtk3/statusbar.py

@@ -12,7 +12,7 @@ from __future__ import division, unicode_literals
 import logging
 
 from gi.repository import Gtk
-from gi.repository.GObject import timeout_add
+from gi.repository.GLib import timeout_add
 
 import deluge.component as component
 from deluge.common import fsize, fspeed, get_pixmap

deluge/ui/gtk3/torrentview.py

@@ -14,7 +14,8 @@ import logging
 from locale import strcoll
 
 from gi.repository.Gdk import ModifierType, keyval_name
-from gi.repository.GObject import TYPE_UINT64, idle_add
+from gi.repository.GLib import idle_add
+from gi.repository.GObject import TYPE_UINT64
 from gi.repository.Gtk import EntryIconPosition
 from twisted.internet import reactor
 
@@ -30,7 +31,7 @@ log = logging.getLogger(__name__)
 try:
     CTRL_ALT_MASK = ModifierType.CONTROL_MASK | ModifierType.MOD1_MASK
 except TypeError:
-    # Sphinx AutoDoc has a mock issue with gtk.gdk masks.
+    # Sphinx AutoDoc has a mock issue with Gdk masks.
     pass