Merge #334: Add missing topMargin to Navigation Bar middle detail

72fe12f qml: add missing topMargin to Navigation Bar middle detail (jarolrod)

Pull request description:

  This was missed in #264

  | master | pr |
  | ------ | -- |
  | <img width="642" alt="Screen Shot 2023-05-26 at 4 03 33 PM" src="https://github.com/bitcoin-core/gui-qml/assets/23396902/fc1523fd-0742-4beb-abb4-850f72a80fe3"> | <img width="642" alt="Screen Shot 2023-05-26 at 3 57 54 PM" src="https://github.com/bitcoin-core/gui-qml/assets/23396902/d643d02e-4410-4267-9521-5405039b0f53"> |

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ACKs for top commit:
  johnny9:
    ACK 72fe12f

Tree-SHA512: 9d94d0e031160b6dc33cf4f27d79880dfda6482527146ea129ed98460d91b2177b87404d2ac59e4ac728531444f244abd3e38b049a8ab3106db45bf8f7fbebdd

Author: hebasto

src/qml/controls/NavigationBar.qml

@@ -32,6 +32,7 @@ RowLayout {
         Loader {
             Layout.alignment: Qt.AlignHCenter
             id: middle_detail
+            Layout.topMargin: 4
             active: true
             visible: active
             sourceComponent: root.middleDetail