Finalize grid mode

[olipyskoty]

Contributing to Twilio

All third party contributors acknowledge that any contributions they provide will be made under the same open source license that the open source project is provided under.

• [x] I acknowledge that all my contributions will be made under the project's license.

Pull Request Details

JIRA link(s):

• VIDEO-10220

Description

This PR makes some final changes to the grid view behavior:

• Removes white borders (no changes made to dominant speaker border)
• Changes the max grid participants options to 4, 9, 16, 25
• Makes grid view the default view
• Updates naming from "Collaboration Mode" and "Grid Mode" to Collaboration View and Grid View to be consistent with iOS
• Updates screenshare behavior so that users will return to whatever room view they were using prior to screenshare starting
• Changes pagination behavior so that each page has unique participants and none carry over from a previous page

Burndown

Before review

• [ ] Updated CHANGELOG.md if necessary
• [x] Added unit tests if necessary
• [ ] Updated affected documentation
• [x] Verified locally with npm test
• [x] Manually sanity tested running locally
• [x] Included screenshot as PR comment (if needed)
• [x] Ready for review

Before merge

• [ ] Got one or more +1s
• [ ] Re-tested if necessary