Refactors addEditBookmarkHanger and addEditBookmark into redux

[NejcZdovc]

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

Resolves #8927

Auditors: @bsclifton

Test Plan:

• Test that creating a bookmark on the bookmarks toolbar with the star button works
• Test that creating a bookmark on the bookmarks toolbar by dragging the un/lock icon works
• Test that creating a bookmark folder on the bookmarks toolbar works
• Test that moving a bookmark into a folder by drag and drop on the bookmarks folder works
• Test that clicking a bookmark in the toolbar loads the bookmark.
• Test that clicking a bookmark in a bookmark toolbar folder loads the bookmark.

Reviewer Checklist:

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

[luixxiul]

The test plan (copied from Wiki) works.