[ButtonBase] Restore the original keyboardFocusCheckTime value (#9019)
[ButtonBase] Restore the original keyboardFocusCheckTime value (#9019)

I'm having a hard time reproducing the issue.
I'm assuming that setting the value back to the one Nathan used
in the first place will help.

Closes #8874
kybarg/material-ui,mui-org/material-ui,cherniavskii/material-ui,mbrookes/material-ui,kybarg/material-ui,Kagami/material-ui,lgollut/material-ui,cherniavskii/material-ui,rscnt/material-ui,oliviertassinari/material-ui,oliviertassinari/material-ui,cherniavskii/material-ui,callemall/material-ui,Kagami/material-ui,callemall/material-ui,rscnt/material-ui,rscnt/material-ui,mbrookes/material-ui,allanalexandre/material-ui,cherniavskii/material-ui,oliviertassinari/material-ui,kybarg/material-ui,mbrookes/material-ui,Kagami/material-ui,mui-org/material-ui,callemall/material-ui,Kagami/material-ui,mui-org/material-ui,kybarg/material-ui,callemall/material-ui