Added ability to set the caption extention in dataset viewer, captioner, and trainer so one dataset can have multiple caption styles in different files with different extensions. Added dataset caption template for a blank ideogram 4 formatted template.

toolkit/data_loader.py

@@ -604,11 +604,6 @@ class AiToolkitDataset(LatentCachingMixin, ControlCachingMixin, CLIPCachingMixin
             if self.is_generating_controls:
                 # always do this last
                 self.setup_controls()
-        else:
-            if self.dataset_config.poi is not None:
-                # handle cropping to a specific point of interest
-                # setup buckets every epoch
-                self.setup_buckets(quiet=True)
         self.epoch_num += 1
 
     def __len__(self):