LP1982887: Repair translations for eg2 client

LP1982887: Repair translations for eg2 client

Previously following the build instructions for the Czech localization
placed the results in eg2/cs-CZ/cs-CZ and also broke the en-US build.
These changes bring the staff client a little more in line with current
Angular localization methods.

Note that currently both en-US and cs-CZ are always built. This can be
limited to en-US by using "--localize false" on the ng build command line.
Until an alternative method to determine the number of available locales is
implemented the only way to hide the locale selector is to edit environment.prod.ts.

Signed-off-by: Jason Boyer <JBoyer@equinoxOLI.org>