Localization: consider using platform resources

[enricocid]

Is your feature request related to a problem? Please describe.
Not a bug, just a suggestion.

I think You should consider using android.R.string.ok and android.R.string.cancel for positive/negative buttons so You don't have to deal with translations.

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[maxkeppeler]

You are right, I removed the existing sheets_ok and sheets_cancel strings and replaced with them with the android string resource. Probably didn't think of it at the beginning. Thanks!