Widen about-box build date
Widen about-box build date

On high resolution screens with 200% scaling the build date was
overflowing. This change widens the box to increase the margin for error
and probably fix this.

google/UIforETW,ariccio/UIforETW,google/UIforETW,mwinterb/UIforETW,ariccio/UIforETW,mwinterb/UIforETW,mwinterb/UIforETW,ariccio/UIforETW,ariccio/UIforETW,google/UIforETW,google/UIforETW