Separate emoji and activity controls

What does this MR do and why?

Separates the controls for emoji/creating a new branch from the controls related to the activity log (sort/filter/timeline).

Screenshots or screen recordings (2022-09-12 03:05)

These screenshots are with the :work_items_hierarchy feature enabled.

Issue

Description	Before	After
Wide display. 🎉 Emoji award controls and "Create merge request" moved below description. 🎉 "Activity" header with activity sort/filter contols.
Small display (top of page). 🎉 Lots of room for emoji award control and "Create merge request" dropdown.
Small display (top of "notes"). 🎉 Previous clutter is cleaned up.

Epic

Description	Before	After
Wide display. 🎉 Emoji award controls moved below description. 🎉 "Activity" header with activity sort/filter contols.
Small display (top of page).
Small display (top of "notes"). 🎉 Looks much better and lots of less clutter.

MR

Description	Before	After
Wide display. 🎉 Emoji award controls moved below description. 🎉 "Activity" header with activity sort/filter contols.
Small display (top of page).
Small display (top of "notes").

Incident

Description	Before	After
Wide display. 🎉 Emoji award controls moved below description. 🎉 "Activity" header with activity sort/filter contols. 🎉 "Show Timeline View Toggle" button is intact next to sort/filter control.
Small display (top of page).
Small display (top of "notes"). 🎉 So much cleaner!

Incident on "Timeline" Tab

Description	Before	After
🎉 Nothing changed.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Original screenshots (outdated)

This MR scope has changed since it was first opened. These are the original screenshots of the MR in it's original state.

Desktop

Before	After

Mobile

Before	After

Related to ✨ Beautifying our UI: Create:Code Review ✨ (#364574 - closed)