This feature is triggered unexpect for some users. We may want to
implement GUI for this fast layer modifying feature
Revert "Merge pull request #440 from ajisaacs/master"

This reverts commit 8c8d7a604a19c988f8ef9bbb990bee00e47347c1, reversing
changes made to 7acb050fb2f69408bec2a2f71cc5b4483acaccb9.