Fix some Qt warnings

[chapulina]

🦟 Bug fix

Summary

Fix these warnings:

[ign-8] [GUI] [Wrn] [Application.cc:649] [QT] file::/WorldControl/WorldControl.qml:88:3: QML RoundButton: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.

and

[GUI] [Wrn] [Application.cc:753] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: Failed to initialize QSettings instance. Status code is: 1
[GUI] [Wrn] [Application.cc:753] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: The following application identifiers have not been set: QVector("organizationName", "organizationDomain")
[GUI] [Wrn] [Application.cc:753] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: Failed to initialize QSettings instance. Status code is: 1
[GUI] [Wrn] [Application.cc:753] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: The following application identifiers have not been set: QVector("organizationName", "organizationDomain")
[GUI] [Wrn] [Application.cc:753] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: Failed to initialize QSettings instance. Status code is: 1
[GUI] [Wrn] [Application.cc:753] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: The following application identifiers have not been set: QVector("organizationName", "organizationDomain")
[GUI] [Wrn] [Application.cc:753] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: Failed to initialize QSettings instance. Status code is: 1
[GUI] [Wrn] [Application.cc:753] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: The following application identifiers have not been set: QVector("organizationName", "organizationDomain")

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
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[codecov]

Codecov Report

Merging #376 (a6164e1) into ign-gui3 (5428d26) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##           ign-gui3     #376      +/-   ##
============================================
+ Coverage     65.83%   65.86%   +0.03%     
============================================
  Files            29       29              
  Lines          3202     3205       +3     
============================================
+ Hits           2108     2111       +3     
  Misses         1094     1094              

Impacted Files	Coverage Δ
src/Application.cc	85.91% <100.00%> (+0.12%)	⬆️

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[mjcarroll]

After years of looking at those warnings, happy to see them gone!

[osrf-triage]

This pull request has been mentioned on Gazebo Community. There might be relevant details there:

https://community.gazebosim.org/t/new-ignition-releases-2022-04-13-fortress-edifice/1367/1