Clear cherry-picked commits after pasting

It can be tedious after each cherry-pick opearation to clear the
selection by pressing escape in order for lazygit to stop displaying
info about copied commits. Also, it seems to be a rare case to
cherry-pick commits to more than one destination.

The simplest solution to address this issue is to clear the selection
upon paste.

The only exception is a merge conflict. Initially, I wanted to clear
selected commits in this scenario too. During a discussion we found out
that it may be convenient to have the copied commits still around.
Aborting the rebase and pasting the commits in the middle of a branch
can be a valid use case.

pkg/integration/tests/cherry_pick/cherry_pick_during_rebase.go

@@ -68,6 +68,9 @@ var CherryPickDuringRebase = NewIntegrationTest(NewIntegrationTestArgs{
 					Content(Contains("Are you sure you want to cherry-pick the copied commits onto this branch?")).
 					Confirm()
 			}).
+			Tap(func() {
+				t.Views().Information().Content(DoesNotContain("commit copied"))
+			}).
 			Lines(
 				Contains("pick  CI two"),
 				Contains("pick  CI three"),