Fixing vod thumbnailer; handling signal removal on tab close

+ more attempts at leak fixes; thumbnailer plugin updates and corrections

plugins/thumbnailer/icons/icon.py

@@ -50,8 +50,8 @@ class Icon(DesktopIconMixin, VideoIconMixin, MeshsIconMixin):
 
             if not thumbnl:
                 # TODO: Detect if not in a thread and use directly for speed get_system_thumbnail
-                thumbnl = self.get_system_thumbnail(full_path, self.sys_icon_wh[0])
-                # thumbnl = self._get_system_thumbnail_gtk_thread(full_path, self.sys_icon_wh[0])
+                # thumbnl = self.get_system_thumbnail(full_path, self.sys_icon_wh[0])
+                thumbnl = self._get_system_thumbnail_gtk_thread(full_path, self.sys_icon_wh[0])
                 if not thumbnl:
                     raise IconException("No known icons found.")
 
@@ -144,6 +144,8 @@ class Icon(DesktopIconMixin, VideoIconMixin, MeshsIconMixin):
         event   = threading.Event()
         GLib.idle_add(_call_gtk_thread, event, result)
         event.wait()
+
+        event   = None
         return result[0]
 
 
@@ -156,6 +158,7 @@ class Icon(DesktopIconMixin, VideoIconMixin, MeshsIconMixin):
 
             if data:
                 icon_path = data.get_filename()
+
                 return GdkPixbuf.Pixbuf.new_from_file_at_size(icon_path, width = size, height = size)
 
             raise IconException("No system icon found...")
@@ -202,4 +205,4 @@ class Icon(DesktopIconMixin, VideoIconMixin, MeshsIconMixin):
         pixbuf = GdkPixbuf.Pixbuf.new_from_bytes(data, GdkPixbuf.Colorspace.RGB,
                                                             False, 8, w, h, w * 3)
 
-        return pixbuf.scale_simple(wxh[0], wxh[1], 2) # BILINEAR = 2
+        return pixbuf.scale_simple(wxh[0], wxh[1], 2) # BILINEAR = 2