goto dialog remembers last line where cursor was in

[woho]

<Ctrl>+G (menu 'search/Go To...' ) launches the GoTo dialog

I just found out (and could not find documented in online help) that subsequently launching the dialog toggles between the 2 last lines visited (== the cursor was in)

e.g. I'm in line 321 and want to go to line 4

- <Ctrl>+G,
- enter '4',
- press 'Go to' button => I'm in line 4; dialog disappeared
- <Ctrl>+G => '321' is filled in automatically
- 'GoTo' => I'm in 321
- <Ctrl>+G => '4' is filled in automatically