Update MSVC compiler options for version 1.5.1 release

[j2doll]

This pull request updates the QXlsx library to improve compatibility, especially with MSVC and different Qt versions, and bumps the library version. The main changes involve build system enhancements for compiler and Qt version handling, as well as a workaround for MSVC-specific iterator issues.

Build system and compatibility improvements:

• Updated the QXlsx library version from 1.5.0 to 1.5.1 in CMakeLists.txt to reflect the new release.
• Added logic in QXlsx.pri to set the C++ standard based on the Qt version: C++11 for Qt 5, C++17 for Qt 6, with informative messages during configuration.
• Added a workaround in QXlsx/header/xlsxglobal.h for MSVC by providing a custom make_checked_array_iterator to address compatibility issues.
• Modified CMakeLists.txt to enforce the /permissive flag for MSVC builds, ensuring standards compliance and preventing conflicts with /permissive-.

Code cleanup:

• Removed commented-out hard-coded QXlsx version string from mainwindow.cpp and unnecessary source/header entries from QXlsx.pro. [1] [2]

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Maintainability Rating on New Code (required ≥ A)

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