Add support for ISO Dates

[Gurran]

Describe the feature that you'd like
I'd like to be able to see the dates in ISO 8601 fromat.

Additional context (optional)
Git already supports this with git log --date=iso.

[mhutchie]

Thanks for raising this feature request, this would definitely be a nice addition to Git Graph!

Dates and times appear in three places in Git Graph:

• Date Column (an ideally short date & time value to minimise the volume of text in the table) [e.g. 25 Sep 2019 17:30]
• Commit Details View (full date & time value) [e.g. Wed Sep 25 2019 17:30:13 GMT+1000]
• Annotated Tag Details (full date & time value) [same as Commit Details View]

What would you suggest for the short an long formats under ISO 8601? How about:

• Short format: yyyy-mm-dd hh:mm -> 2019-09-25 17:30
• Long format: yyyy-mm-dd hh:mm:ss +|-hhmm -> 2019-09-25 17:30:13 +1000

[Gurran]

Long format:
To make it as simple as possible. I suggest same long date format that git uses.
yyyy-mm-dd hh:mm:ss +|-hhmm -> 2019-09-26 10:48:59 +0200

Short format:
I think your suggestion looks really good.
yyyy-mm-dd hh:mm -> 2019-09-25 17:30

[mhutchie]

This will be available in v1.17.0.

If you'd like to use it before the next release, you can download v1.17.0-beta.1, and install it following the instructions provided here.

[Gurran]

Thank you so much for including this change. It really means a lot to me! 😃