Adds a hue-saturation PDB call with the 'overlap' parameter. Fixes #634008
Fixes pt_BR translation for 'clear document history' button
libgimp: add gimp_hue_saturation_overlap(...) to gimp.def
Revert "gimp.def change due to<tab> SNAFU

This reverts commit 2ad6f86ec101a4a121fba5395c345079bd3ebd07.
libgimp: add gimp_hue_saturation_overlap(...) to gimp.def