Add 'Reset' action to clear scrollback buffer and reset the terminal

[berkeleyinc]

The missing ability to reset the screen while another program is running inside the terminal was bugging me too.

See #3997
and #4199

This adds the Action "Reset".

[chrisduerr]

See #3997, #4152 and #4199.

[berkeleyinc]

@chrisduerr
My reason for which I need it:
I'm developing an application and the program outputs a lot of data.
Using the scrollback buffer, I'm grepping for specific strings in the output.
In the scrollback buffer, there is also the output of the previous run and I don't want that to be shown in my vi-mode searches.
Of course, I could manually "reset", but sometimes I'm deciding whether I need the previous output case by case.
Having to add or remove a "reset" statement is a lot of hassle and disturbs the programming flow.
This is just one example of the added comfort, the Reset action would bring.
I've recently came back from termite to alacritty but this issue keeps driving me away.

That's why I'd kindly ask to take it into discussion again. The other github issues show that it's a needed feature and many other major terminals have this included as well.

[chrisduerr]

I don't see how a reset action would be necessary for this. Again this seems to indicate that people using these actions are not familiar with what the action does.

[berkeleyinc]

Is there another way to clear the scrollback buffer?

[chrisduerr]

Yeah, the ClearHistory action.

[berkeleyinc]

Well, that's exactly what I looked for.
I tried the option before but I guess I was used to the clearing of the screen.

So it's all fine then.
Thank you for the quick answer!