Correct or add some error-related strings.
Correct or add some error-related strings.

(How fortunate that the SpiderOak server is failing to provide access to
my dc1 test account, so I could notice the errors. But, only after a lot
of time scrambling, trying to figure out the internationalization I was
working on broke the app, before I considered that the server might
suddenly be broken.)

SpiderOak/SpiderOakMobileClient,antoniodesouza/SpiderOakMobileClient,SpiderOak/SpiderOakMobileClient,antoniodesouza/SpiderOakMobileClient