Improve performance of python console output

[rainman110]

Description

Just a small fix to avoid copies in for loops, which turned out to be a hot spot in the syntax highlighter.

This is just a part of the performance fix. The rest need to be done in the python module itself.

Fixes #1139

How Has This Been Tested?

Manually and via Performance Analysis in Visual Studio. Before, the for loop took a significant amount of the computing time.

Checklist:

• [ ] A test for the new functionality was added (if applicable).
• [ ] All tests run without failure.
• [ ] The changelog has been extended, if this MR contains important changes from the users's point of view.
• [ ] The new code complies with the GTlab's style guide.
• [ ] New interface methods / functions are exported via EXPORT. Non-interface functions are NOT exported.
• [ ] The number of code quality warnings is not increasing.

[mariusalexander]

have you tried to use a range based for loop instead (together with qAsConst) )? foreach does a copy of the container, which for Qt types is fast but this might be faster still. especially if you do not modify the range

https://doc.qt.io/qt-6/foreach-keyword.html

[rainman110]

have you tried to use a range based for loop instead (together with qAsConst) )? foreach does a copy of the container, which for Qt types is fast but sthis might be faster still. especially if you do not modify the range

No. It will probably do not harm to add qAsConst.

[rainman110]

@mariusalexander I added qAsConst as suggested