Localise hard-coded strings

[CharlVS]

Changelog:

• Localise the messages used for the ZHTLC activation feature.

What to test:

• Check all UI text elements associated with ZHTLC coins in the main language (English) and, preferably, also a secondary language you understand.

[kivqa]

There is two place that still have hardcoded text when ZHTLC activation is cancelled toast and message in top of screen @CharlVS can you take a look pls

[CharlVS]

@kivqa Please check out my latest changes