Core: Enable compiling with MSVC /permissive- (#11014)

* Base: Fixes for MSVC permissive-

* App: Fixes for MSVC permissive-

* Gui: Fixes for MSVC permissive-

* Main: Fixes for MSVC permissive-

* Fem: Fixes for MSVC permissive-

* Material: Fixes for MSVC permissive-

* Part: Fixes for MSVC permissive-

* Mesh: Fixes for MSVC permissive-

* Points: Fixes for MSVC permissive-

* Robot: Fixes for MSVC permissive-

* TechDraw: Fixes for MSVC permissive-

* Path: Fixes for MSVC permissive-

* Core; Changes per review comments

* TD: Revision from wandererfan

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/Gui/DlgProjectInformationImp.cpp

@@ -146,7 +146,7 @@ void DlgProjectInformationImp::accept()
         (QLatin1String("\n"), QString::KeepEmptyParts);
 #endif
     QString text = lines.join(QLatin1String("\\n"));
-    _doc->Comment.setValue(text.isEmpty() ? "" : text.toUtf8());
+    _doc->Comment.setValue(text.isEmpty() ? QByteArray() : text.toUtf8());
 
     QDialog::accept();
 }