cannot plot in a separate window

PlotlyJS v0.13.0

PlotlyJS used to output into a separate window, not into the plot pane (which I really liked). Now from version 0.13 it uses the plot pane.

is there a way to output into a separate window still (one can make them full screen, easier to switch between plots using taskbar, imho)?
I tried
```
ENV["PLOTS_USE_ATOM_PLOTPANE"] = "false"
using PlotlyJS
plot([1,2,3], rand(3))
```
and still have the output in the plot pane. is it a bug or me missing some parameters?

********************
```
julia> versioninfo()
Julia Version 1.2.0
Commit c6da87ff4b (2019-08-20 00:03 UTC)
Platform Info:
OS: Windows (x86_64-w64-mingw32)
CPU: Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-6.0.1 (ORCJIT, skylake)
Environment:
JULIA_EDITOR = "C:\Users\\AppData\Local\atom\app-1.40.1\atom.exe" -a
JULIA_NUM_THREADS = 12

[c52e3926] Atom v0.11.1
[6e4b80f9] BenchmarkTools v0.4.3
[3e78a19a] Bukdu v0.4.6
[336ed68f] CSV v0.5.13
[a93c6f00] DataFrames v0.19.4
[31c24e10] Distributions v0.21.3
[01fcc997] FTPClient v1.0.1
[5789e2e9] FileIO v1.0.7
[59287772] Formatting v0.4.1
[cd3eb016] HTTP v0.8.6
[033835bb] JLD2 v0.1.3
[682c06a0] JSON v0.21.0
[e5e0dc1b] Juno v0.7.2
[b27032c2] LibCURL v0.5.2
[f0f68f2c] PlotlyJS v0.12.5
[91a5bcdd] Plots v0.27.0
[2dfb63ee] PooledArrays v0.5.2
[f269a46b] TimeZones v0.10.2
[ea10d353] WeakRefStrings v0.6.1
[0f1e0344] WebIO v0.8.11
```