Bugfix: reset deleted entity count on clear()

11 jobs for feature/track-deleted-entities in 4 minutes and 12 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #56752
VS2013
VS2013-32-bit

00:01:01

passed #56751
VS2013
VS2013-64-bit

00:00:57

passed #56750
VS2015
VS2015-32-bit

00:01:25

passed #56749
VS2015
VS2015-64-bit

00:01:11

passed #56748
VS2017
VS2017-32-bit

00:01:44

passed #56747
VS2015
VS2017-64-bit

00:01:21

passed #56744
Linux
clang-c++11

00:02:33

passed #56746
Linux
cppcheck

00:00:50

passed #56753
Linux
doc

00:00:20

passed #56743
Linux
gcc-c++11

00:02:46

passed #56745
Apple
macos-c++11

00:02:54