Bugfix: datepicker `updatemode="bothdates"` not always respected #1522

Job	Run time
Build Dash Package	2m 47s
Detect Relevant Path Changes	5s
Build on Windows	4m 39s
Lint & Unit Tests (Python 3.8)	3m 18s
Lint & Unit Tests (Python 3.12)	3m 27s
DCC Lint Tests (Python 3.12)	1m 21s
DCC Lint Tests (Python 3.8)	1m 21s
Typing Tests	3m 26s
DCC Integration Tests (Python 3.12, Group 3)	3m 31s
DCC Integration Tests (Python 3.12, Group 2)	10m 0s
DCC Integration Tests (Python 3.8, Group 3)	3m 24s
Main Dash Tests (Python 3.12, Group 2)	7m 25s
DCC Integration Tests (Python 3.12, Group 1)	11m 33s
DCC Integration Tests (Python 3.8, Group 1)	11m 30s
DCC Integration Tests (Python 3.8, Group 2)	9m 33s
Main Dash Tests (Python 3.12, Group 1)	7m 19s
Main Dash Tests (Python 3.8, Group 1)	7m 0s
Main Dash Tests (Python 3.12, Group 3)	7m 19s
Main Dash Tests (Python 3.8, Group 3)	6m 44s
Main Dash Tests (Python 3.8, Group 2)	8m 57s
Run Background & Async Callback Tests (Python ${{ matrix.python-version }})	-1s
Table Unit/Lint Tests (Python ${{ matrix.python-version }})	-1s
Run Backend Callback Tests (Python ${{ matrix.python-version }})	-1s
Dash Table Visual Tests	-1s
HTML Components Tests (Python ${{ matrix.python-version }})	-1s
WebSocket Tests (Python ${{ matrix.python-version }})	-1s
Table Server Tests (Group ${{ matrix.test-group }})	-1s
Finalize Percy Snapshots	19s
Consolidated Test Report	14s
Store Build Artifacts	0s
	1h 55m 5s

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