fix programmatic focus/blur events, typing into currently focused

[kuceb]

• react-select v2 (programmatic focus events while browser out of focus)
  fix react-select v2 dropdown issues #1486

• programmatic blur events while browser out of focus
  fix Blur event is not fired reliably in some situations #1176

• typing into currently focused
  fix cy.type shouldn't perform actionability if subject is the currently focused element  #3001

• Visibility errors when window is hidden during headed mode test execution
  fix Visibility errors when window is hidden during headed mode test execution #4039

• Need ability to type into elements that are actionable through {tab}, but not actionable by click
  partially addresses Need ability to type into elements that are actionable through {tab}, but not actionable by click #4420

fix #2176

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tasks

• intercept calls to .blur + test
• add comments on tests referencing issues
• add test for focusing on already active element
• make document.hasFocus() always return true
• follow all the rules on whether element should fire focus events (is focusable, not activeElement)
• move test from focus_spec to type_spec
• add more specific element tests to focus_blur_spec
• add tests for selectionchange event to focus_blur_spec
• add intercept for SVGElement focus/blur

review tasks

• fix package.json dep version

[brian-mann]

We need to work on this PR a bit and clean it up before merging. Also we need some issues that this PR fixes. Wasn't there one or more issues you went through on the existing cy.click() issues that this fixed?

[brian-mann]

Also it appears this PR is fixing two things - 1 being forcing the focus/blur events, the other finding the focusable element in the situation such as [contenteditable]

We'll need to reference multiple issues here.

[kuceb]

updated the fixed issues, should probably add a test for call to .blur however

edit: still need to fix this for programmatic blur

[kuceb]

Updating this now to intercept .blur calls

[PhilipGrey]

Looking forward to this.