Small typo fixes and proposal for ellipsis

[DigiH]

Small typo fixes and proposal for using dedicated ellipsis character

Checklist:

• The pull request is done against the latest development branch
• Only one feature/fix was added per PR and the code change compiles without warnings
• I accept the DCO.

[emericg]

Grammar looks good (probably ^^)
Regarding the ellipsis, while I really don't care, what I can tell you is the next person that will do anything in the app or in the documentation won't be instinctively using them...
Like the 3/4 space spaces or the single character for ℃, these things are invisible to anyone not looking for them.

[DigiH]

Possibly with the ellipsis, but since all the OSs which the app runs on, Windows, macOS, iOS and Android, use this ellipsis character instead of three periods, I just thought it would be nicely consistent with the OS displays.

Like the 3/4 space spaces or the single character for ℃, these things are invisible to anyone not looking for them.

For people like me they just jump out, probably also because that's what also did to make a living ;)

[1technophile]

Thanks for the PR