Ensure that a popup is not inert which can happen when rendered inside a dialog

[agubler]

Type: bug

The following has been addressed in the PR:

• [ ] There is a related issue
• [ ] All code matches the style guide
• [ ] Unit tests are included in the PR
• [ ] For new widgets, an entry has been added to the .dojorc
• [ ] For new widgets, theme.variant() is added to the root domnode
• [ ] Any widget variant uses theme.compose like this
• [ ] WidgetProperties are exported

Description:

The Dialog uses the inert middleware which sets everything other than the Dialog and it's children as inert (i.e. disabled). This is problematic when using a widget that uses the body tag as it's not a child to the dialog and therefore is set to inert - The example is using a typeahead in the dialog, that renders a list into the popup. This change to the popup sets it as always not inert.

[vercel[bot]]

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widget-test-docs – ./

🔍 Inspect: https://vercel.com/dojo/widget-test-docs/CgfHQ3gXdGUw5P5sQdu5NopGVWeQ
✅ Preview: https://widget-test-do-git-fork-agubler-popup-should-not-be-iner-f19edd.vercel.app

dojo.widgets – ./

🔍 Inspect: https://vercel.com/dojo/dojo.widgets/8zQP3dD2ywzGGNNMFnsBCemrB2tZ
✅ Preview: https://dojowidgets-git-fork-agubler-popup-should-not-be-inert-dojo1.vercel.app

[codecov[bot]]

Codecov Report

Merging #1685 (dad3da2) into master (34141dd) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1685   +/-   ##
=======================================
  Coverage   89.98%   89.98%           
=======================================
  Files          94       94           
  Lines        5012     5014    +2     
  Branches     1354     1354           
=======================================
+ Hits         4510     4512    +2     
  Misses        248      248           
  Partials      254      254           

Impacted Files	Coverage Δ
src/popup/index.tsx	96.15% <100.00%> (+0.15%)	:arrow_up:

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