* fix(participant-pane) Use the sorted participant list from redux instead of sorting it on every render making it better performant. Match the participant order with that of the order in the filmstrip. Also move the participants with raised hand to the top of the list.

* ref(filmstrip) Move enableThumbnailReordering flag to testing section.

* fix(participants) Add new selectors for getting sorted participants.

Reorder the sub-groups (shares, speakers and rest of the participants) always on dominant speaker changes and when participants join or leave.

enableThumbnailReordering flag (enabled by default) will be used to check if the thumbnails needs to be reodred in the UI.