react-grid-layout 1.4.3 -> 1.5.0

[ghsolomon]

Hoist P/R Checklist

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[ghsolomon]

Replaces #3546

[lbwexler]

where does the default of 10 come from was that installed by RGL? should we implement/document on the model for clarity

[ghsolomon]

where does the default of 10 come from was that installed by RGL? should we implement/document on the model for clarity

RGL's default is containerPadding = margin = [10, 10]. I'll fix to remain consistent with what they're doing.

[ghsolomon]

Closes #3526