Suppress missing fraction warnings

When doing forecasts on an aggregated series that uses fractions a warning is given if the current period is outside the fraction(s) range.

Since there might sometimes be a lot of warnings/errors given it is possible to suppress these kinds of warnings for the time being.

By right-clicking on the series and selecting “Suppress fraction warnings” the series will no longer give warnings for that serie. Eventually we might get fractions for the selected forecast period, this will then reset this suppression so that the next time we get missing fractions, the warning reappears.