Office widget in talk: user added every time the chat is opened

[pschopen]

Due to the new integration of office documents into chats an editing user gets added everytime one opens the chat. NC doesn't understand that

• a) editing ends when the chat is closed and
• b) that it's the same user that edits the document.

[nickvergessen]

@juliushaertl I thought we had gone with "view only until clicked"? Is something missing in this office app?