Hotfix/ubac share - Githubissues

Issue #, if available:

Description of changes:

Fixed a bug that allowed non-Admin users to see call details if they had (or could guess) the callId.
Fixed a bug that prevented calls from being shared for live calls.
Added share meeting button to call split panel and call details pages.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

aws-samples / amazon-transcribe-live-meeting-assistant