Revert "Bug 1053647: delete space when reverting an autocorrection and don't insert space when user selects a word suggestion"

This reverts commit c547fb031f27b28c1134f1d4c21e9d0b93f77c91.
Merge pull request #23593 from comoyo/bug1053647-revert

Revert "Bug 1053647: delete space when reverting an autocorrection and don't insert space when user selects a word suggestion"