Missing operator modulo

[Martin Widemann]

It would be nice to have a modulo operator (https://en.wikipedia.org/wiki/Modulo_operation) for the boolean expression. Currently I build it with a simple workaround, but that's not very nice.

({Total time spent (minutes)} / 30) = round({Total time spent (minutes)} / 30)

[Fidel Castro Armario]

Implemented function modulus(dividend, divisor) in version 2.2.7.