Buttons disappear on hcat/vcat of plots

[Vaibhavdixit02]

Describe the bug

Buttons seem to work on individual plot but then disappear when multiple plots are concatenated

Version info

Please provide the following:

1. Commit 539f3ce943 (2020-09-23 23:17 UTC)
   Platform Info:
   OS: macOS (x86_64-apple-darwin18.7.0)
   CPU: Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz
   WORD_SIZE: 64
   LIBM: libopenlibm
   LLVM: libLLVM-9.0.1 (ORCJIT, icelake-client)

2. [a03496cd] PlotlyBase v0.5.0

MWE

function mytoggle(x, y)
    data = PlotlyBase.scatter(x=x, y=y)
    button1 = PlotlyBase.attr(; method="relayout", args=["yaxis.type", ""], label="linear")
    button2 = PlotlyBase.attr(; method="relayout", args=["yaxis.type", "log"], label="log")
    layout = PlotlyBase.Layout(updatemenus=[PlotlyBase.attr(; y=1.0,
                                                          yanchor="top",
                                                          buttons = [button1,
                                                                     button2,
                                                                     ])])
    PlotlyBase.Plot(data, layout)
end
mytoggle(rand(100), rand(100))

plots = hcat([mytoggle(rand(10), rand(10)) for i in 1:10]...)