clang-tidy modernize-use-default-member-init check

This versions check if the PropertyVector is
assigned to the requested mesh item type and has
the required number of components.

Clang format run on near-the-header lines.

Happy New Year

Especially on iterator types and 'new' allocations.

This is automatic replacement with
ag '(?<!std::)size_t(?!\w)' --ignore-dir=ThirdParty -l | xargs perl -pi.bak -e  's/(?<!std::)size_t(?!\w)/std::size_t/g'

- moved ProjectData.* to Applications/ApplicationsLib
- removed Vrpn folder in DataExplorer