Adds a new property PostMessageOrigin to WOPI's CheckFileInfo.
The inner frame then only sends message to target with origin
mentioned in this property.
Also implement editor initialization WOPI specs. Inner frame
sends a App_LoadingStatus message to us when ready, and we send
Host_PostmessageReady when we are ready.
Move whether the file is editable or not logic when generating a
token and store it in the DB with the access token instead of
checking it dynamically in WOPI calls.
Lukas Reschke
Pranav Kant
Robin Appelman
Ashod Nakashian
Andras Timar