Add a method to "reset" a figure

[swevrywhere]

I want the ability to reset a figure via code in the same way as the figure reset tool.

I asked a related question on Stack Overflow, and it was recommended that I open an issue to track the request.

http://stackoverflow.com/questions/39278110/whats-the-command-to-reset-a-bokeh-plot

[markjay4k]

I would like the same.

Looking for a way to easily clear a bokeh figure

[ross8711]

I also would need way of doing this.

[uweschmitt]

Would also need this.

[nanodan]

Also need this.

[pchavanne]

Would need this too.

[Milly]

Need this.

[malewick]

Would also need this.

[bryevdv]

After #7757 is merged, this will work:

from bokeh.io import show
from bokeh.layouts import column
from bokeh.models import Button, CustomJS
from bokeh.plotting import figure

p = figure(tools="reset,pan,wheel_zoom,lasso_select")
p.circle(list(range(10)), list(range(10)))

b = Button()
b.js_on_click(CustomJS(args=dict(p=p), code="""
    p.reset.emit()
"""))

show(column(p, b))