Lower limit for regex search field rather than categorical

src/streamlit_filter.py

@@ -47,7 +47,7 @@ def filter_dataframe(df: pd.DataFrame, force_on: bool = False, force_on_columns:
         for column in to_filter_columns:
             left, right = st.columns((1, 20))
             # Treat columns with < 17 unique values as categorical
-            if isinstance(df[column].dtype, pd.CategoricalDtype) or df[column].nunique() < 50:
+            if isinstance(df[column].dtype, pd.CategoricalDtype) or df[column].nunique() < 17:
                 user_cat_input = right.multiselect(
                     f"Values for {column}",
                     df[column].unique(),