Spell, punctuation and capitalisation tests for UI text and wording.

Asked about this in chat here: https://gitlab.slack.com/conversation/ci/p1487068149006483

@axil mentioned hunspell although it may be better suited for big text blocks.

Usecase

We want to unify all styling and wording of text used within the application. A spell check on that wouldn't hurt as well.

Problem

We have mixed styling and wording of text used within the application. Also there may be spelling mistakes that we are currently not catching.

Proposal

Have an automated testing process with a CI testing suite that:

• Checks for US English spelling
• Checks for capitalization and punctuation as in the UX Guide
• Supports a custom words dictionary, to include exceptions

The testing scope depends on the work involved. If it's fairly demanding to test everything, we can start small with buttons, lists and headings, for example.