Qt: show time of day in 'last played' game info, log current time when RPCS3 boots

[elad335]

1. This should simplify testing many games (for example for PR testing) by looking at the time of day of the 'last played' section and checking if it occurs after the time point that you booted RPCS3. I.e. Simplifying the process of knowing which games you have already tested from a large list.
2. By knowing current time with date when RPCS3 boots viewers/recipients of the log can attest early the provided logs from users such as the of PR testers or of users on forums instead of wasting time reading irrelevant logs.

[Megamouse]

I think it's kinda useless to know at which minute you stopped playing 6 days ago for the large majority of the Userbase.
It would make more sense if it was restricted to the same day for example

[Megamouse]

Or maybe let the user choose which of both formats to use