Add additional info dialog for PKC synching playlists

resources/language/resource.language.en_gb/strings.po

@@ -1398,7 +1398,7 @@ msgstr ""
 
 # Shown during sync process
 msgctxt "#39715"
-msgid "items"
+msgid "Synching playlists"
 msgstr ""
 
 # Error message if an xml, e.g. advancedsettings.xml cannot be parsed (xml is screwed up; formated the wrong way). Do NOT replace {0} and {1}!

resources/lib/library_sync/full_sync.py

@@ -428,9 +428,13 @@ class FullSync(common.fullsync_mixin):
             if self.isCanceled() or not self.full_library_sync():
                 self.successful = False
                 return
-            if common.PLAYLIST_SYNC_ENABLED and not playlists.full_sync():
+            if common.PLAYLIST_SYNC_ENABLED:
+                if self.dialog:
+                    self.dialog.close()
+                    self.dialog = xbmcgui.DialogProgressBG()
+                    self.dialog.create(utils.lang(39715))
+                if not playlists.full_sync():
                     self.successful = False
-                return
         finally:
             common.update_kodi_library(video=True, music=True)
             if self.dialog: