Support initial text separate from summary
Support initial text separate from summary

When a new file is uploaded, the page text defaults to the summary,
or vice versa.
This change should provide the ability to have them different.

Change-Id: Idd927c0e3256ca610ae418afdfbbaa3afb5ba9d9

hasteur/g13bot_tools_new,npdoty/pywikibot,VcamX/pywikibot-core,emijrp/pywikibot-core,PersianWikipedia/pywikibot-core,smalyshev/pywikibot-core,wikimedia/pywikibot-core,h4ck3rm1k3/pywikibot-core,magul/pywikibot-core,wikimedia/pywikibot-core,trishnaguha/pywikibot-core,hasteur/g13bot_tools_new,Darkdadaah/pywikibot-core,happy5214/pywikibot-core,jayvdb/pywikibot-core,xZise/pywikibot-core,hasteur/g13bot_tools_new,npdoty/pywikibot,darthbhyrava/pywikibot-local,Darkdadaah/pywikibot-core,jayvdb/pywikibot-core,magul/pywikibot-core,happy5214/pywikibot-core,icyflame/batman,TridevGuha/pywikibot-core,h4ck3rm1k3/pywikibot-core,valhallasw/pywikibot-core