Do not allow .kra files as file layers
Nesting .kra files is dangerous, since a .kra file can contain
file layers itself, which is not supported.
BUG:386515,394211,325686
(cherry picked from commit 6828f33fe3e92fd4ca151bd44ce1886118d01ed6)
rempt | Jun 5 2018, 2:33 PM |