Show date of last commit next to git hash on options page

[eScribMac]

It would be convenient to see the date of the update in addition to the hash. The date is available in the github api response already.

[LRFLEW]

Interesting idea. Right now, the launcher doesn't access the Github API for OpenRCT2 (only for checking for launcher updates), but goes through the openrct2.org API. Adding this would require an update to the API as well. @JarnoVgr thoughts?

[GingerAdonis]

The API already has the addedTime (ISO string) and addedTimeUnix (unix timestamp in seconds) fields. :)