[Libreoffice] [REVIEW] fdo#39348 checking grammar button deletes sentence

[Caolán McNamara]

suggested fix, possible 3-4 candidate. Make "SpellDialog::Impl_Restore"
re-read the current sentence the same way as SPELLUNDO_UNDO_EDIT_MODE
does.

http://cgit.freedesktop.org/libreoffice/core/commit/?id=63eef1c1cf203aa75093b479a1e8dd24593546e7&context=24

C.