The quick-timer config screen now ends its list of presets with a
"Custom…" row that opens the timer keypad. Anything from 1 second to
59:59 is accepted; past that the keypad shows a range hint and OK stays
disabled, since the widget's readout is sized for MM:SS. A stored value
that isn't a preset marks the Custom row, with the value as its summary.
The keypad dialog is lifted out of the timer editor into a shared
TimerDurationDialog, so both use the same one; the editor's now also
shows the range hint the setup screen shows.
Closes#7
makiolaj
8cbb8b311c