Add option to push pasted item to bottom of the list

[merlondev]

Important UPDATE!:

This pull request implements the feature requirement "Add option to push pasted item to bottom of the list" almost well already (but see "missing things" below, and maybe some slight improvements and interop with other Maccy features necessary).
I've noticed though, that this doesn't - in fact at all - help with the original goal I had with this issue, which was originally the goal of this PR.
(which is to implement a kind of "paste queue", where I can copy item1, copy item2, copy item3 and then paste, paste, paste emits item1, item2, item3 - in that order)

So I guess it's up to you @p0deje now, if you think it's worth it to add this functionality, for those that might (for whatever reason) need this.

Original Pull Request Description:

Add the option to move the item you just pasted to the bottom of the list.
(for now) Only when pasting via the Maccy ui!

when "paste automatically" option is enabled:

• either by pressing it or hitting enter when the item is selected

else

• the same as above but while holding down option

This is implemented by adding an extra sort criterion in Sorter.sort enabled behind a boolean flag (in Defaults)

This pull request is still a WIP, just to show a minimal sample implementation of this issue: #1175

Things that are still missing:

• !!! there is still a "mistake" where you can never really "unset" lastPastedAt
  the solution is something like historyItem.lastPastedAt = Date.distantPast in a place like .copy(item: HistoryItem) ASWELL AS .copy(text: String)
• making the feature usable (as of now, the "paste queue" workflow still isn't really possible)

[jameswomack]

I would love to see this get finished. Let me know if you want help with anything specific.