Clear region after using define_annotations

[hoxbro]

It would give some unintuitive behavior:

import holoviews as hv
import pandas as pd

from holonote.annotate import Annotator, SQLiteDB

hv.extension("bokeh")

connector = SQLiteDB(filename=":memory:")
annotator = Annotator({"x": float}, connector=connector)
data = {"description": ["A", "B"], "start_number": [0.1, 0.5], "end_number": [0.4, 0.8]}
annotator.define_annotations(pd.DataFrame(data), x=("start_number", "end_number"))

hv.Curve([]) * annotator

Before:

screenrecord-2023-11-06_15.49.03.mp4

After:

screenrecord-2023-11-06_17.50.36.mp4