message: Embed the Date label and NSPickerView into StackView and center horizontal (mac)
diff: <view key="contentView" id="Vxl-ZN-LqT">
  <rect key="frame" x="1" y="1" width="186" height="28"/>
  <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
  + <subviews>
  + <stackView distribution="equalSpacing" orientation="horizontal" alignment="baseline" spacing="0.0" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" detachesHiddenViews="YES" translatesAutoresizingMaskIntoConstraints="NO" id="gKy-N8-5Oe">
  + <rect key="frame" x="21" y="2" width="145" height="22"/>
  <subviews>
  <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="UYO-W1-uSI" customClass="CursorButton" customModule="TogglDesktop" customModuleProvider="target">
  - <rect key="frame" x="31" y="5" width="61" height="18"/>
  + <rect key="frame" x="0.0" y="3" width="61" height="18"/>
  <buttonCell key="cell" type="bevel" title="Tuesday," bezelStyle="rounded" alignment="center" imageScaling="proportionallyDown" inset="2" id="DZ6-Ag-EuF">
  <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
  <font key="font" metaFont="system" size="14"/>
  </connections>
  </button>
  <datePicker verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="PKt-Ig-fee">
  - <rect key="frame" x="89" y="2" width="84" height="22"/>
  + <rect key="frame" x="61" y="0.0" width="84" height="22"/>
  <constraints>
  <constraint firstAttribute="height" constant="22" id="60V-hr-SJM"/>
  </constraints>
  </connections>
  </datePicker>
  </subviews>
  + <visibilityPriorities>
  + <integer value="1000"/>
  + <integer value="1000"/>
  + </visibilityPriorities>
  + <customSpacing>
  + <real value="3.4028234663852886e+38"/>
  + <real value="3.4028234663852886e+38"/>
  + </customSpacing>
  + </stackView>
  + </subviews>
  <constraints>
  - <constraint firstItem="PKt-Ig-fee" firstAttribute="centerY" secondItem="Vxl-ZN-LqT" secondAttribute="centerY" constant="1" id="EGV-gt-f22"/>
  - <constraint firstItem="PKt-Ig-fee" firstAttribute="leading" secondItem="UYO-W1-uSI" secondAttribute="trailing" constant="-3" id="lji-Oq-B7P"/>
  - <constraint firstItem="UYO-W1-uSI" firstAttribute="centerY" secondItem="Vxl-ZN-LqT" secondAttribute="centerY" id="u2a-uP-rxD"/>
  - <constraint firstAttribute="trailing" secondItem="UYO-W1-uSI" secondAttribute="trailing" constant="94" id="zVj-az-eGs"/>
  + <constraint firstItem="gKy-N8-5Oe" firstAttribute="centerX" secondItem="Vxl-ZN-LqT" secondAttribute="centerX" id="Rli-js-4iw"/>
  + <constraint firstItem="gKy-N8-5Oe" firstAttribute="centerY" secondItem="Vxl-ZN-LqT" secondAttribute="centerY" constant="1" id="e4a-R8-SDt"/>
  </constraints>
  </view>
  <color key="borderColor" name="upload-border-color"/>
  