Edit mode when an annotation is selected erroneously allows for creation of new annotation

[droumis]

Looks like the relevant change is here. Indeed, reverting this function resolves the issue. @ahuang11

Notice that in the "After #101" video below, the erroneously created annotation also goes to the wrong axis. This remains the case even with #113. But I guess it doesn't matter because the intended behavior is to not allow new drag-created annotations when an existing annotation is selected, and edit mode is active.

Code

This code is a bit simpler than what is shown in the video because the tabulator app is not yet merged.

import holoviews as hv; hv.extension('bokeh')
import panel as pn; pn.extension()
import numpy as np

from holonote.annotate import Annotator
from holonote.app import PanelWidgets

annotator = Annotator({"x": float, "y": float}, fields=["description"])
annotator_widgets = PanelWidgets(annotator)

bounds = (-1, -1, 1, 1)
data = np.array([[0, 1], [1, 0]])
img = hv.Image(data, kdims=['x', 'y'], bounds=bounds)
img_right = hv.Image(data, kdims=['z', 'y'], bounds=bounds)  # y as second kdim! so HSpan

left_plot = annotator * img
right_plot = annotator * img_right
layout = left_plot + right_plot

annotator.set_regions(x=(-0.15, 0.15), y=(-0.25, 0.25))
annotator.add_annotation(description="Test")

pn.Column(annotator_widgets, layout)

Prior to #101 ✅

video1786144967.mp4

After #101 ❌

video2786144967.mp4

[ahuang11]

Probably something related to https://github.com/holoviz/holonote/pull/101/files#diff-bb719105cbef9f78377af003eabcd4e554a21c3aba3c19c0fb92cac4666836f1L207-L217