[Tooltip] Not rendered when entering from a disabled neighbor

[rexmac]

Issue summary

Official React bug report: facebook/react#10109

Expected behavior

Moving mouse from a disabled, <Tooltip />-wrapped button onto an enabled <Tooltip />-wrapped button should trigger the display of the active button's tooltip.

Actual behavior

The tooltip is not displayed. The following GIF shows an example of the bug:

Steps to reproduce the problem

Render two buttons side-by-side (e.g., the <Pagination /> component), disable one button, and wrap the other in a <Tooltip />.

Reduced test case

https://codesandbox.io/s/hopeful-moser-8242n

Specifications

• Are you using the React components? (Y/N): Y
• Polaris version number: 3.18.0
• Browser: Chrome, Firefox (likely others)
• Device: Macbook Pro
• Operating System: macOS Mojave (10.14.5)

  System:
    OS: macOS 10.14.5
    CPU: x64 Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
    Memory: 876.51 MB / 16.00 GB
    Shell: 5.3 - /bin/zsh
  Binaries:
    Node: 10.13.0 - ~/.nvm/versions/node/v10.13.0/bin/node
    Yarn: 1.13.0 - ~/.dev/yarn/v1.13.0/bin/yarn
    npm: 6.4.1 - ~/.nvm/versions/node/v10.13.0/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  Browsers:
    Chrome: 75.0.3770.100
    Firefox: 67.0
    Safari: 12.1.1
  npmPackages:
    react: ^16.4.0 => 16.4.0
    react-dom: ^16.4.0 => 16.4.0

[ghost]

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