Merged
requested to merge nmariusp/kalk:work/nmariusp/knumber_float_setDefaultFloatPrecision into master
Sync with kcalc.
Fix failing test "Precision >= 1000: (KNumber(1) + KNumber(\"1e-980\")) - KNumber(1)".
Sync with kcalc.
Fix failing test "Precision >= 1000: (KNumber(1) + KNumber(\"1e-980\")) - KNumber(1)".