French RawTherapee version

[Morgan_Hardwood]

@lebarhon

@lebarhon

If I translate the French string in the second example, I get:
The quality can be adapted to the noise frame. Set on “high” will increase the noise reduction at the cost of a longer processing time.

That is not a translation of the English string.

@lebarhon

TP_DIRPYRDENOISE_MAIN_MODE_TOOLTIP;“Conservative” preserves low frequency chroma patterns, while “aggressive” obliterates them.

Discard the previously-translated French string when the new English one has been updated, don’t try to merge the old one with the new one.