Figures in windows not tabs #13164

I want to create multiple figure with Matplotlib in python, using the macosx backend. Currently, my code looks something like this:

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0, 2, 100)

f1 = plt.figure(1)
plt.plot(x,x**2)

f2 = plt.figure(2)
plt.plot(x,x**2)
plt.show()

This creates a single window, with two tabs. One for figure 1, and one for figure 2. I suggest an option to open them in separate windows.

Note that the tabs likely come from the automatic tab-support built into the OS since macOS 10.12
Matplotlib version

• Operating system: macOS 10.14.3
• Matplotlib version: 3.0.2
• Matplotlib backend (print(matplotlib.get_backend())): MacOSX
• Python version: 3.7.1
• Jupyter version (if applicable): -
• Other libraries: -
• Installed via: pip
• Python installation via pyenv