Added random tag generator

- Similar to A1111, but with sampler settings and only shuffles comma separated tags rather than each word. Not really needed, but makes the "Tag" tab less empty. Maybe doing something closer to A1111 would be better since it appears to generate the tags with variables counts.
- Disabled (second attempt) label text activating input element. `label > *` is problematic.

__init__.py

@@ -191,6 +191,9 @@ def ui_rules():
         Rule("model-add-drag-strict-on-field", False, bool),
         Rule("model-add-offset", 25, int),
         Rule("download-save-description-as-text-file", True, bool),
+        Rule("tag-generator-sampler-method", "Frequency", str),
+        Rule("tag-generator-count", 10, int),
+        Rule("tag-generator-threshold", 2, int),
     ]