Fix QLatin1String deprecated warning
Fix QLatin1String deprecated warning

clang++ -std=c++17 -O2 -fdata-sections -ffunction-sections -MMD -Isrc -D_FORTIFY_SOURCE=2 -D_GLIBCXX_ASSERTIONS -fasynchronous-unwind-tables -fexceptions -fpic -fpie -fstack-protector-strong -pipe -Wall -Wextra -Wdeprecated -Wvla -Wshadow -I/usr/include/qt/QtCore -I/usr/include/qt -I/usr/include/qt/QtGui -I/usr/include/qt/QtWidgets -DQT_SVG_LIB -I/usr/include/qt/QtSvg -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB  -fPIC -DQT_DISABLE_DEPRECATED_BEFORE=0x050C00 -Igen -c -o obj/release/gui-qt/common/graphics/zoomsettingsmanager.o src/gui-qt/common/graphics/zoomsettingsmanager.cpp
src/gui-qt/common/graphics/zoomsettingsmanager.cpp:40:25: warning: 'QLatin1Literal' is deprecated: Use QLatin1String [-Wdeprecated-declarations]
    settings.beginGroup(QLatin1Literal("zoom"));
                        ^
/usr/include/qt/QtCore/qstring.h:232:1: note: 'QLatin1Literal' has been explicitly marked deprecated here
QT_DEPRECATED_X("Use QLatin1String")
^
/usr/include/qt/QtCore/qglobal.h:294:33: note: expanded from macro 'QT_DEPRECATED_X'
 #  define QT_DEPRECATED_X(text) Q_DECL_DEPRECATED_X(text)
                                ^
/usr/include/qt/QtCore/qcompilerdetection.h:675:55: note: expanded from macro 'Q_DECL_DEPRECATED_X'
 #    define Q_DECL_DEPRECATED_X(text) __attribute__ ((__deprecated__(text)))
                                                      ^
src/gui-qt/common/graphics/zoomsettingsmanager.cpp:53:25: warning: 'QLatin1Literal' is deprecated: Use QLatin1String [-Wdeprecated-declarations]
    settings.beginGroup(QLatin1Literal("zoom"));
                        ^
/usr/include/qt/QtCore/qstring.h:232:1: note: 'QLatin1Literal' has been explicitly marked deprecated here
QT_DEPRECATED_X("Use QLatin1String")
^
/usr/include/qt/QtCore/qglobal.h:294:33: note: expanded from macro 'QT_DEPRECATED_X'
 #  define QT_DEPRECATED_X(text) Q_DECL_DEPRECATED_X(text)
                                ^
/usr/include/qt/QtCore/qcompilerdetection.h:675:55: note: expanded from macro 'Q_DECL_DEPRECATED_X'
 #    define Q_DECL_DEPRECATED_X(text) __attribute__ ((__deprecated__(text)))
                                                      ^
2 warnings generated.

undisbeliever/untech-editor,undisbeliever/untech-editor