add a way to disable no translation found warnings

[ErnestM1234]

when a translation cannot be resolved, it gives the following warning: 'Error: string translation error t("...") could not locate translation'. This can create a lot of extra errors if one is using the m() function liberally:

m(gt("translate this"))
// Error: string translation error t("traduire ceci") could not locate translation 

Would be nice to have a flag to disable this warning