Remove foreach for C++11 ranged for

[jeromearz]

Can you provide docs about why this change is useful? (foreach macro deprecated, C++11 for loops more performant...)

[sithlord48]

Its use is discouraged

Qt foreach macro docs

Note: Since Qt 5.7, the use of this macro is discouraged. It will be removed in a future version of Qt. Please use C++11 range-for, possibly with qAsConst(), as needed.

[myst6re]

Thanks!