handle watchdog's file created event using the on_modified

handler

+ move processing thumbnails and album colors to the populate class
+ move processing artist colors behind the populate call in run_periodic_checks

app/functions.py

@@ -28,10 +28,6 @@ def run_periodic_checks():
         except PopulateCancelledError:
             pass
 
-        ProcessTrackThumbnails()
-        ProcessAlbumColors()
-        ProcessArtistColors()
-
         if utils.Ping()():
             try:
                 CheckArtistImages()
@@ -40,4 +36,6 @@ def run_periodic_checks():
                     "Internet connection lost. Downloading artist images stopped."
                 )
 
+        ProcessArtistColors()
+
         time.sleep(300)