Unify option descriptions

[Faalagorn]

Summary

None

Purpose of change

Unifty descriptions of options.

Describe the solution

• Always use "If true, " first for the options that are "true"/"false".
• Use 0 = disabled consistently.
• Enforce double spaces (mostly in Android options).
• Use double space between . and - between option values.
• Make sure all options end with a full stop.
• Fix minor issues.

Describe alternatives you've considered

• Use "If false, " for the options that are "true" by default.
• Don't use double space between . and - between option values.
• Don't use double spaces for Android.
• Recheck everything one more time (there's probably still something to fix).

Testing

It's all just the text changes, so hopefully should work fine. Maybe I'll test it deeper tomorrow.

Additional context

Should fix a few Transifex issues if merged.