Make three-dot / 3-dot context menu consistent

[z0rgster]

One thing that really bugs me (and confuses all of my colleagues) when using deck is the inconsistency of the context menus between a card in "closed" and "opened" state.

When viewing the board without any cards opened, every card has a little three-dots button that opens a context menu. That is a quite practical and intuitive way to do something with that card.

But when the card is opened, that "opened" view has a three-dots button as well, but with totally different functions. Two functions to be precise. One of them is "open in larger/smaller view" which is semi-redundant because that option can be set in the settings menu on the bottom left. The other one is "post to conversation" which is somehow completely separated from all the other useful functions like "move", "archive" etc.

My suggestion put all functions into one context menu and show it at both locations. That way I can finally move or archive a card that is opened in the large overlay view without closing it first. Fixing this would also solve #3180.