Fixed on mouseover doesn't work with right side sidebar

[simonhong]

fix brave/brave-browser#26198

Mouse over detect widget's bound was not updated for right-side sidebar.
Also event detect widget's bounds claculation is updated.

Resolves

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Squashed any review feedback or "fixup" commits before merge, so that history is a record of what happened in the repo, not your PR
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally: npm run test -- brave_browser_tests, npm run test -- brave_unit_tests, npm run lint, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

SidebarBrowserTest.EventDetectWidgetTest

[sangwoo108]

LGTM

[kjozwiak]

Verification PASSED on Win 11 x64 using the following build(s):

Brave | 1.47.18 Chromium: 107.0.5304.62 (Official Build) nightly (64-bit)
-- | --
Revision | 1eec40d3a5764881c92085aaee66d25075c159aa-refs/branch-heads/5304@{#942}
OS | Windows 11 Version 22H2 (Build 22621.675)

Reproduced the original issue using the STR/Cases outlined via brave/brave-browser#26198 (comment) with 1.47.13 Chromium: 107.0.5304.62 as per the following:

reproducedIssue.mp4

Verified the same STR/Cases as per the above with 1.47.18 Chromium: 107.0.5304.62 as per the following:

Settings.Appearance.-.Brave.2022-10-26.00-19-52.mp4