dcc redesign: Do not resort dropdown when `multi=False` #444

Job	Run time
Detect Relevant Path Changes	4s
Build Dash Package	3m 37s
Typing Tests	2m 41s
Table Server Tests (Group ${{ matrix.test-group }})	0s
Run Background & Async Callback Tests (Python ${{ matrix.python-version }})	0s
Table Unit/Lint Tests (Python ${{ matrix.python-version }})	0s
	6m 22s

Provide feedback