[bugfix] re-enable 'Quit' option for BaseBot.user_confirm method.
[bugfix] re-enable 'Quit' option for BaseBot.user_confirm method.

'Quit' option was lost in I3d4ea6461 but still needed.
This patch re-enables this option, discarding automatic_quit and
call the corresponding regular BaseBot.quit method instead of
raising an exception which could crop out elsewhere.

Bug: T126154
Change-Id: I0cbc61eb23194a29a5a1e85864ceb0d48305e20b

jayvdb/pywikibot-core,magul/pywikibot-core,npdoty/pywikibot,Darkdadaah/pywikibot-core,jayvdb/pywikibot-core,hasteur/g13bot_tools_new,hasteur/g13bot_tools_new,PersianWikipedia/pywikibot-core,Darkdadaah/pywikibot-core,happy5214/pywikibot-core,h4ck3rm1k3/pywikibot-core,happy5214/pywikibot-core,wikimedia/pywikibot-core,magul/pywikibot-core,hasteur/g13bot_tools_new,wikimedia/pywikibot-core,darthbhyrava/pywikibot-local,smalyshev/pywikibot-core,h4ck3rm1k3/pywikibot-core,npdoty/pywikibot