Do not delete properties that are in-use on clear(); needs more testing

9 jobs for dont-delete-active-properties-needs-testing in 5 minutes and 49 seconds
latest
Status Job ID Name Coverage
  Test
passed #98240
VS2015
VS2015-32-bit

00:01:23

passed #98239
VS2015
VS2015-64-bit

00:01:34

passed #98238
VS2017
VS2017-32-bit

00:01:10

passed #98237
VS2015
VS2017-64-bit

00:01:43

passed #98234
Linux
clang-c++11

00:04:42

passed #98236
Linux
cppcheck

00:03:15

passed #98241
Linux
doc

00:00:07

passed #98233
Linux
gcc-c++11

00:04:43

passed #98235
Apple
macos-c++11

00:01:51