Release 1.7.2

Release 1.7.2rc1

Changes for 1.7.1

fixed typo; fixes #14133

Refs #13161, moved out demos/gridx which will hosted at https://githu…

…b.com/evanhw/gridx (still needs to be updated)

Refs #14010 !strict. Reverted the previous change. This is not a cust…

…omBase example.